Gaya APA
Christensen, M, C, W.
(2009).
Be A Network Marketing Superstar
.
Surabaya:
PT. Menuju Insan Cemerlang.
Gaya MLA
Christensen, Mary, Christensen,, Wayne.
"Be A Network Marketing Superstar".
Surabaya:
PT. Menuju Insan Cemerlang,
2009.
Text.