Gaya APA
Harefa, Andrias. (1999).
Multi Level Marketing .
Jakarta:
PT Gramedia pustaka Utama.
Gaya Chicago
Harefa, Andrias.
Multi Level Marketing.
Jakarta:
PT Gramedia pustaka Utama,
1999.
Text.
Gaya MLA
Harefa, Andrias.
Multi Level Marketing.
Jakarta:
PT Gramedia pustaka Utama,
1999.
Text.
Gaya Turabian
Harefa, Andrias.
Multi Level Marketing.
Jakarta:
PT Gramedia pustaka Utama,
1999.
Print.