APA (7th ed.) Citation

Groos, K. (1919). The play of man / by K. Groos. Appleton.

Chicago Style (17th ed.) Citation

Groos, K. The Play of Man / by K. Groos. Appleton, 1919.

MLA (9th ed.) Citation

Groos, K. The Play of Man / by K. Groos. Appleton, 1919.

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