Gaya APA
Sigma, . (2011).
145 questions & answers start your own business : pasti bisa buka usaha! (Ed. 1).
Yogyakarta:
GMedia.
Gaya MLA
Sigma, .
"145 questions & answers start your own business : pasti bisa buka usaha!".
Ed. 1
Yogyakarta:
GMedia,
2011.
Text.