APA

Keller A. G., . (1937). Man's rough road : backgrounds and bearings from mankind's experience. New York: Frederick a. Stokes Co. and Yale University Press.

Chicago

Keller A G, . 1937. Man's rough road : backgrounds and bearings from mankind's experience. New York: Frederick a. Stokes Co. and Yale University Press.

Harvard

Keller A. G., . (1937). Man's rough road : backgrounds and bearings from mankind's experience. New York: Frederick a. Stokes Co. and Yale University Press.

MLA

Keller A G, . Man's rough road : backgrounds and bearings from mankind's experience. New York: Frederick a. Stokes Co. and Yale University Press. 1937.