Gaya APA
Principles Of Economics. (1994).
Amerika:
Macmillan Publishing.
Gaya Chicago
Principles Of Economics.
.
Amerika:
Macmillan Publishing,
1994.
.
Gaya MLA
Principles Of Economics.
.
Amerika:
Macmillan Publishing,
1994.
.
Gaya Turabian
Principles Of Economics.
Amerika:
Macmillan Publishing,
1994.
.