Gaya APA
Indonesia Business Information 1980-81. ().
Jakarta:
Pacific Indo Utama.
Gaya Chicago
Indonesia Business Information 1980-81.
.
Jakarta:
Pacific Indo Utama,
.
Text.
Gaya MLA
Indonesia Business Information 1980-81.
.
Jakarta:
Pacific Indo Utama,
.
Text.
Gaya Turabian
Indonesia Business Information 1980-81.
Jakarta:
Pacific Indo Utama,
.
Print.