Cita APA (7th ed.)

Black, J. D. (1959). Economics for agriculture: Selected writings. Harvard University Press.

Cita Chicago (17th ed.)

Black, John Donald. Economics for Agriculture: Selected Writings. Cambridge: Harvard University Press, 1959.

Cita MLA (9th ed.)

Black, John Donald. Economics for Agriculture: Selected Writings. Harvard University Press, 1959.