APA (7th ed.) Citation

(1929). Observing the observers. The Williams & Wilkins Company.

Chicago Style (17th ed.) Citation

Observing the Observers. Baltimore, U.S.A.: The Williams & Wilkins Company, 1929.

MLA (9th ed.) Citation

Observing the Observers. The Williams & Wilkins Company, 1929.

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