APA (7e ed.) Bronvermelding

Coxhead, I. A. (1991). Environmental specific rates and biases of technical change in agriculture. s.n.

Chicago (17e ed.) Bronvermelding

Coxhead, Ian A. Environmental Specific Rates and Biases of Technical Change in Agriculture. [S.l: s.n, 1991.

MLA (9e ed.) Bronvermelding

Coxhead, Ian A. Environmental Specific Rates and Biases of Technical Change in Agriculture. s.n, 1991.