Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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