Cita APA (7th ed.)

Smith, J. R. (1929). Tree crops: A permanent agriculture. Harcourt, Brace.

Cita Chicago (17th ed.)

Smith, J. Russell. Tree Crops: A Permanent Agriculture. New York: Harcourt, Brace, 1929.

Cita MLA (9th ed.)

Smith, J. Russell. Tree Crops: A Permanent Agriculture. Harcourt, Brace, 1929.