Gaya APA
SPEDDING, C.R.W.. (1979).
An introduction to agricultural systems .
London:
Applied Sience Publishers.
Gaya Chicago
SPEDDING, C.R.W..
An introduction to agricultural systems.
London:
Applied Sience Publishers,
1979.
Text.
Gaya MLA
SPEDDING, C.R.W..
An introduction to agricultural systems.
London:
Applied Sience Publishers,
1979.
Text.
Gaya Turabian
SPEDDING, C.R.W..
An introduction to agricultural systems.
London:
Applied Sience Publishers,
1979.
Print.