Gaya APA
Gravelle, Hugh. (1981).
Microeconomics .
USA:
Longman Inc..
Gaya Chicago
Gravelle, Hugh.
Microeconomics.
USA:
Longman Inc.,
1981.
Text.
Gaya MLA
Gravelle, Hugh.
Microeconomics.
USA:
Longman Inc.,
1981.
Text.
Gaya Turabian
Gravelle, Hugh.
Microeconomics.
USA:
Longman Inc.,
1981.
Print.