Cita APA (7a ed.)

Harlan, J. R. (1992). Crops & man (2nd ed.). ASA.

Cita Chicago Style (17a ed.)

Harlan, Jack R. Crops & Man. 2nd ed. Madison, Wis.: ASA, 1992.

Cita MLA (8a ed.)

Harlan, Jack R. Crops & Man. 2nd ed. ASA, 1992.