Gaya APA
Introduction to reference work. (1987).
New York:
Mc Graw Hill.
Gaya Chicago
Introduction to reference work.
fifth edition.
New York:
Mc Graw Hill,
1987.
Buku.
Gaya MLA
Introduction to reference work.
fifth edition.
New York:
Mc Graw Hill,
1987.
Buku.
Gaya Turabian
Introduction to reference work.
New York:
Mc Graw Hill,
1987.
Buku.