APA (7th ed.) Citation

Steckle, L. C. (1949). Problems of human adjustment. Harper.

Chicago Style (17th ed.) Citation

Steckle, Lynde C. Problems of Human Adjustment. [Place of publication not identified]: Harper, 1949.

MLA (9th ed.) Citation

Steckle, Lynde C. Problems of Human Adjustment. Harper, 1949.