Gaya APA
Bach, George Leland. (1960).
Economics .
USA:
Prentice-Hall.
Gaya Chicago
Bach, George Leland.
Economics.
USA:
Prentice-Hall,
1960.
Text.
Gaya MLA
Bach, George Leland.
Economics.
USA:
Prentice-Hall,
1960.
Text.
Gaya Turabian
Bach, George Leland.
Economics.
USA:
Prentice-Hall,
1960.
Print.