Citation, Documentation of Sources
Q. How should I cite a work I’ve already cited in a previous chapter: in full each time I cite it or with formal direction to the previous citation?
A. Either method is fine. You can cite a work in full the first time it appears in each chapter, or you can use short citations for all but the first one in the book. The latter method works best if you include a bibliography, so readers don’t have to rummage through the entire book to find the full citation. Or if you don’t have a bibliography, you can refer the reader to the note where the full citation appeared: Miller, Quest, 81 (see chap. 1, n. 4).