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Which is correct: [Bonus question: should there be a question mark here instead of a colon?]

The book contains Marx and Engels' theories about the nature of society and politics.


The book contains Marx's and Engels' theories about the nature of society and politics

It seems to me that the former is more common, but I am confused here since the latter seems more logical to me (and matches what you would see in my native language Icelandic).

marked as duplicate by tchrist, choster, Edwin Ashworth, Matt E. Эллен, FumbleFingers May 9 '14 at 11:50

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • @tchrist Thanks, I looked but didn't find this, possibly because the title of that question is not search-optimal. – Sid May 8 '14 at 21:52

Since Marx and Eagles is a compound noun, you need only one apostrophe. As you say this a more common use than having an apostrophe after each noun.


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