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