The standard way of doing this is the oxford referencing guide.

 http://guides.is.uwa.edu.au/c.php?g=325241&p=2177430

You put a number at the point of reference and then at the end of the document you have the all of full references documented by number.

A crude example:

The results of the trial[1] were disputed by a later report[2] which claimed that

Then at the end, under the title "References":

1. Full reference to the information on the trial.

2. Full reference to the information on the report.

3. etc...

In response to your edit, there is a less formal way of doing this where you would just write "see document x, section y". You sort of answered this yourself.

The standard way of doing this is the oxford referencing guide.  Click here for examples.

You put a number at the point of reference and then at the end of the document you have the all of full references documented by number.

A crude example:

The results of the trial1 were disputed by a later report[2] which claimed that

Then at the end, under the title "References":

1. Full reference to the information on the trial.

2. Full reference to the information on the report.

3. etc...

In response to your edit, there is a less formal way of doing this where you would just write "see document x, section y". You sort of answered this yourself.

The standard way of doing this is the oxford referencing guide.

http://guides.is.uwa.edu.au/c.php?g=325241&p=2177430

You put a number at the point of reference and then at the end of the document you have the all of full references documented by number.

A crude example:

The results of the trial[1] were disputed by a later report[2] which claimed that

Then at the end, under the title "References":

1. Full reference to the information on the trial.

2. Full reference to the information on the report.

3. etc...

In response to your edit, there is a less formal way of doing this where you would just write "see document x, section y"

The standard way of doing this is the oxford referencing guide.

http://guides.is.uwa.edu.au/c.php?g=325241&p=2177430

You put a number at the point of reference and then at the end of the document you have the all of full references documented by number.

A crude example:

The results of the trial[1] were disputed by a later report[2] which claimed that

Then at the end, under the title "References":

1. Full reference to the information on the trial.

2. Full reference to the information on the report.

3. etc...

In response to your edit, there is a less formal way of doing this where you would just write "see document x, section y". You sort of answered this yourself.