Gaya APA
SIGMA, . (2011).
145 Questions & Answer Start Your Own Business : Pasti Bisa Buka Usaha! (ed. 1).
YOGYAKARTA:
Gmedia.
Gaya MLA
SIGMA, .
"145 Questions & Answer Start Your Own Business : Pasti Bisa Buka Usaha!".
ed. 1
YOGYAKARTA:
Gmedia,
2011.
Text.