Gaya APA
Dewey, M., Beall, J.
(2011).
Dewey Decimal Classification (DDC) Vol. 4
(
ed.23)
.
Ohio:
OCLC.
Gaya MLA
Dewey, Melvil., Beall, Julianne.
"Dewey Decimal Classification (DDC) Vol. 4".
ed.23
Ohio:
OCLC,
2011.
Text.