Cita APA (7a ed.)

Spedding, C. R. W. (1979). An Introduction to Agricultural Systems. Agricultural Science Publishers.

Cita Chicago Style (17a ed.)

Spedding, C. R. W. An Introduction to Agricultural Systems. London: Agricultural Science Publishers, 1979.

Cita MLA (9a ed.)

Spedding, C. R. W. An Introduction to Agricultural Systems. Agricultural Science Publishers, 1979.