Harefa, A. (1999). Multi-level marketing: Alternatif Karier dan usaha menyongsong milenium ketiga. Saint Joseph's University.
Chicago Style (17th ed.) CitationHarefa, Andrias. Multi-level Marketing: Alternatif Karier Dan Usaha Menyongsong Milenium Ketiga. Saint Joseph's University, 1999.
MLA (8th ed.) CitationHarefa, Andrias. Multi-level Marketing: Alternatif Karier Dan Usaha Menyongsong Milenium Ketiga. Saint Joseph's University, 1999.
Warning: These citations may not always be 100% accurate.