When referencing an edited book, each chapter that you use must be referenced separately (do not reference the whole book). This is because each chapter of the book will have different authors. If you have used more than one chapter from an edited book you must reference them individually.

"Contributions are found when a book has an overall editor or editors and the individual chapters or other components of the book are written by various authors, usually called contributors. One or all of the editors may also be contributing authors. Because a reference should start with the individual or organization responsible for the intellectual content of the publication, begin a reference to a contribution with the author and title of the contribution, followed by the word "In:" and information about the entire book."1

1. Patrias K. Citing medicine: the NLM style guide for authors, editors, and publishers [Internet]. 2nd ed. Wendling DL, technical editor. Bethesda (MD): National Library of Medicine (US); 2007 [updated 2009 Jan 14; cited 2009 Apr 5]. Available from: http://www.nlm.nih.gov/citingmedicine

Note on authors/editors:

Citing Medicine lists all authors/editors in the reference list, however they do state “The following formats are not NLM practice for citing authors, but are acceptable options: If space is a consideration, the number of authors may be limited to a specific number, such as the first three authors or first six authors. Follow the last named author with a comma and “et al.” or “and others”. Check with your Unit Coordinator for more information.

For more book contribution examples see Citing Medicine Ch. 2 Books

For more ebook contribution examples see Citing Medicine Ch. 22 Books and Other Individual Titles on the Internet