Gaya APA
DDC 21 Dewey Decimal Classification Edition 21. (1996).
NEW YORK:
Forest Press.
Gaya Chicago
DDC 21 Dewey Decimal Classification Edition 21.
volume 4.
NEW YORK:
Forest Press,
1996.
Text.
Gaya MLA
DDC 21 Dewey Decimal Classification Edition 21.
volume 4.
NEW YORK:
Forest Press,
1996.
Text.
Gaya Turabian
DDC 21 Dewey Decimal Classification Edition 21.
NEW YORK:
Forest Press,
1996.
Print.