APA Style
Simmonds, N.W.. (1979).
Principles of crop improvement .
London:
Longman.
Chicago Style
Simmonds, N.W..
Principles of crop improvement.
London:
Longman,
1979.
Text.
MLA Style
Simmonds, N.W..
Principles of crop improvement.
London:
Longman,
1979.
Text.
Turabian Style
Simmonds, N.W..
Principles of crop improvement.
London:
Longman,
1979.
Print.