Yeah, Steve_O is right; forget “the industry”.
You have to determine what your client’s objectives are, and build the document in a way that accomplishes them. “Page layout” is a broad concept; does your client need a flyer? A poster? A memo? Once you know what kind of “page” is appropriate, you can start looking around for examples of effective design of that type, but on a fundamental level, you must develop a vision for the piece by considering all the factors that will potentially contribute to its success or failure.
How and where will it be deployed?
Who will read it?
What do they need from it?
What do they want from it?
Why should they care?
What information must it contain?
What information should it not contain?
What does your client need them to do with the information?
How does this fit into the overall experience your client is offering them?
The answers to those and many other questions you could and should ask the client, yourself, and the market, are your “reference”.