Cita APA (7a ed.)

Willkie, H. F., & Kolachov, P. J. (1943). Carburante agrícola: (food for thought). Indiana farm bureau.

Cita Chicago Style (17a ed.)

Willkie, Herman Frederick, y Paul John Kolachov. Carburante Agrícola: (food for Thought). Indianapolis: Indiana farm bureau, 1943.

Cita MLA (8a ed.)

Willkie, Herman Frederick, y Paul John Kolachov. Carburante Agrícola: (food for Thought). Indiana farm bureau, 1943.