"In page" or "on page", which preposition?

Question

"Statement 2 in page 172" or "statement 2 on page 172"?

I write a mathematical book and need to refer to certain page of another mathematical book.

Answer 1

From Longman Dictionary of Contemporary English (see here), the correct preposition is 'on', Example:

The full address is given on page 15.

Answer 2

I would have said the following

You are writing a book on mathematics which references Statement 2 on page 172 'of' another mathematical book.