Gaya APA
Harefa, Andrias. (1999).
Multi Level Marketing (Cet. 1).
Jakarta:
Gramedia Pustaka Utama.
Gaya Chicago
Harefa, Andrias.
Multi Level Marketing.
Cet. 1
Jakarta:
Gramedia Pustaka Utama,
1999.
Text.
Gaya MLA
Harefa, Andrias.
Multi Level Marketing.
Cet. 1
Jakarta:
Gramedia Pustaka Utama,
1999.
Text.
Gaya Turabian
Harefa, Andrias.
Multi Level Marketing.
Cet. 1
Jakarta:
Gramedia Pustaka Utama,
1999.
Print.