Cita APA (7a ed.)

Spedding, C. R. W. (1979). An introduction to agricultural systems. Applied Science.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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