Gaya APA
American Education. (2010).
New York:
McGraw Hill.
Gaya Chicago
American Education.
Cet.15.
New York:
McGraw Hill,
2010.
.
Gaya MLA
American Education.
Cet.15.
New York:
McGraw Hill,
2010.
.
Gaya Turabian
American Education.
New York:
McGraw Hill,
2010.
.