APA (7th ed.) Citation

Giles, R. (1938). Sleep!: The secret of greater power and achievement ("First edition.".). The Bobbs-Merrill company.

Chicago Style (17th ed.) Citation

Giles, Ray. Sleep!: The Secret of Greater Power and Achievement. "First edition.". Indianapolis New York: The Bobbs-Merrill company, 1938.

MLA (8th ed.) Citation

Giles, Ray. Sleep!: The Secret of Greater Power and Achievement. "First edition.". The Bobbs-Merrill company, 1938.