Gaya APA
kaya melalui multi-level salling. (1997).
Jakarta:
Gramedia Pustaka Utama.
Gaya Chicago
kaya melalui multi-level salling.
.
Jakarta:
Gramedia Pustaka Utama,
1997.
.
Gaya MLA
kaya melalui multi-level salling.
.
Jakarta:
Gramedia Pustaka Utama,
1997.
.
Gaya Turabian
kaya melalui multi-level salling.
Jakarta:
Gramedia Pustaka Utama,
1997.
.