A spiral is always negative

During the 1970s, AM stations experienced a declining audience as listeners fled to

A) television. B) cassette recordings. C) FM radio. D) cable television.

Yuudai has found a book that includes some information he may use in his speech. He has taken the following informal notes about it so he can cite it later.Songbirds of North America, by Naomi Davis. Published by Simon & Schuster, 2009. Includes information on migration patterns for a variety of bird species that may be useful when discussing the potential impact of wind turbine farms. Davis is head of the American Association of Birdwatchers.What piece of information has Yuudai forgotten, without which he may not be able to properly cite this source?

A. the publication date B. the author's qualifications C. the title of the source D. the publication location