Cita APA (7a ed.)

Black, J., & Mighell, L. (1951). Interregional Competition in Agriculture. Harvard University press.

Cita Chicago Style (17a ed.)

Black, John, y L. Mighell. Interregional Competition in Agriculture. Cambridge: Harvard University press, 1951.

Cita MLA (8a ed.)

Black, John, y L. Mighell. Interregional Competition in Agriculture. Harvard University press, 1951.