APA (7th ed.) Citation

Psychological disorders. (2009). Sleep disorders. Chelsea House Pubs.

Chicago Style (17th ed.) Citation

Psychological disorders. Sleep Disorders. New York: Chelsea House Pubs, 2009.

MLA (9th ed.) Citation

Psychological disorders. Sleep Disorders. Chelsea House Pubs, 2009.

Warning: These citations may not always be 100% accurate.