Gaya APA
Directpry of special libraries and information. (1987).
Jakarta:
PDII.
Gaya Chicago
Directpry of special libraries and information.
.
Jakarta:
PDII,
1987.
Buku.
Gaya MLA
Directpry of special libraries and information.
.
Jakarta:
PDII,
1987.
Buku.
Gaya Turabian
Directpry of special libraries and information.
Jakarta:
PDII,
1987.
Buku.