Gaya APA
CASE, E., Fair, R, C.
(2003).
Principles of Economics
(
SIXTH EDITION)
.
Amerika:
Prentice Hall.
Gaya MLA
CASE, E.Karl., Fair, Ray, C..
"Principles of Economics".
SIXTH EDITION
Amerika:
Prentice Hall,
2003.
FAKULTAS EKONOMI.