Cita APA (7a ed.)

Spedding, C. (1975). The Biology of agricultural systems (1st edition.). Academic Press.

Cita Chicago Style (17a ed.)

Spedding, C.R.W. The Biology of Agricultural Systems. 1st edition. London: Academic Press, 1975.

Cita MLA (8a ed.)

Spedding, C.R.W. The Biology of Agricultural Systems. 1st edition. Academic Press, 1975.