Gaya APA
Steinbeck, John. (1960).
Once there was a war .
New York:
Bantam Books.
Gaya Chicago
Steinbeck, John.
Once there was a war.
New York:
Bantam Books,
1960.
Buku.
Gaya MLA
Steinbeck, John.
Once there was a war.
New York:
Bantam Books,
1960.
Buku.
Gaya Turabian
Steinbeck, John.
Once there was a war.
New York:
Bantam Books,
1960.
Buku.