Gaya APA
Webster,C.C, ., Wilson,P.N, .
(1980).
Agricultural In The Tropics
(
2nd)
.
Hong Kong:
Longman Group Ltd.
Gaya MLA
Webster,C.C, ., Wilson,P.N, .
"Agricultural In The Tropics".
2nd
Hong Kong:
Longman Group Ltd,
1980.
Text.