In APA, if the whole book has been written by the same author(s), you always cite the whole book and give the page of the reference, thus:
Author, A. A. (1967). Title of Work. Location: Publisher.
... (Author, 1967, p. xxx) ...
If you cite a text in an anthology or a chapter in a textbook where every chapter has been written by a different author, you cite it like this:
Author, A. A., & Author, B. B. (1958). Title of text. In A. Editor & B. Editor (eds.), Title of Book (pp. xxx-xxx). Location: Publisher.
... (Author & Author, 1958, p. xxx) ...
In APA you need to create a citation for every individual text. There is no "cross-referencing" of the kind allowed by MLA. You can cite the whole anthology, if the individual texts all endorse a common viewpoint and you are refering to this (e.g. a collection of texts about a new theory or methodology).
Refer to the APA Manual for more information. You find it in every university or large public library.