Gaya APA
House. (1985).
Boston:
Houghton Mifflin Company.
Gaya Chicago
House.
Cet.3.
Boston:
Houghton Mifflin Company,
1985.
.
Gaya MLA
House.
Cet.3.
Boston:
Houghton Mifflin Company,
1985.
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Gaya Turabian
House.
Boston:
Houghton Mifflin Company,
1985.
.