APA (7th ed.) Citation

Spiegel, R. (1981). Sleep and sleeplessness in advanced age. Spectrum Publications.

Chicago Style (17th ed.) Citation

Spiegel, René. Sleep and Sleeplessness in Advanced Age. New York: Spectrum Publications, 1981.

MLA (9th ed.) Citation

Spiegel, René. Sleep and Sleeplessness in Advanced Age. Spectrum Publications, 1981.