Black, J. D. (1959). Economics for agriculture: Selected writings. Harvard University Press.
Citazione stile Chigago Style (17a edizione)Black, John Donald. Economics for Agriculture: Selected Writings. Cambridge: Harvard University Press, 1959.
Citatione MLA (9a ed.)Black, John Donald. Economics for Agriculture: Selected Writings. Harvard University Press, 1959.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.