APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc, & Nicholson, R. (2013). The placenta: Development, function and diseases. Nova Science Publishers, Inc..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

ebrary, Inc, ба Richard Nicholson. The Placenta: Development, Function and Diseases. Hauppauge, N.Y.: Nova Science Publishers, Inc., 2013.

MLA -ийн эшлэл (9 дэх хэвлэлт)

ebrary, Inc, ба Richard Nicholson. The Placenta: Development, Function and Diseases. Nova Science Publishers, Inc., 2013.