Cita APA (7a ed.)

Weldon, G. P. (1929). Economic biology: A text for students of agriculture and general biology. McGraw-Hill.

Cita Chicago Style (17a ed.)

Weldon, George P. Economic Biology: A Text for Students of Agriculture and General Biology. New York [etc.]: McGraw-Hill, 1929.

Cita MLA (9a ed.)

Weldon, George P. Economic Biology: A Text for Students of Agriculture and General Biology. McGraw-Hill, 1929.