Gaya APA
(et.al), W, W. (1960).
Economics of American Agriculture--2nd ed print vi .
Englewood Cliffs:
Prentice Hall.
Gaya MLA
(et.al), WILCOX,Walter, W.
"Economics of American Agriculture--2nd ed print vi".
Englewood Cliffs:
Prentice Hall,
1960.
Text.