Cita APA (7a ed.)

Spedding, C. R. W. (1975). The biology of agricultural systems. Academic Press.

Cita Chicago Style (17a ed.)

Spedding, C. R. W. The Biology of Agricultural Systems. London, New York: Academic Press, 1975.

Cita MLA (9a ed.)

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