Gaya APA
American Education. (2008).
Boston:
McGraw-Hill.
Gaya Chicago
American Education.
.
Boston:
McGraw-Hill,
2008.
Buku.
Gaya MLA
American Education.
.
Boston:
McGraw-Hill,
2008.
Buku.
Gaya Turabian
American Education.
Boston:
McGraw-Hill,
2008.
Buku.