APA (7th ed.) Citation

Smith, E. E. (1921). Teaching geography by problems. Doubleday, Doran.

Chicago Style (17th ed.) Citation

Smith, Edward Ehrlich. Teaching Geography by Problems. Garden City, N. Y: Doubleday, Doran, 1921.

MLA (9th ed.) Citation

Smith, Edward Ehrlich. Teaching Geography by Problems. Doubleday, Doran, 1921.