Citazione APA

Davis, K. C. (1917). Productive farming (3d ed., rev. and enl.). J.B. Lippincott company.

Stile di citazione Chicago

Davis, Kary Cadmus. Productive Farming. 3d ed., rev. and enl. Philadelphia and London: J.B. Lippincott company, 1917.

Citazione MLA

Davis, Kary Cadmus. Productive Farming. 3d ed., rev. and enl. J.B. Lippincott company, 1917.