Gaya APA
Nasution, A, H, I, M, D. (2007).
Entrepreneurship : Membangun Spirit Teknopreneurship .
yogyakarta:
ANDI.
Gaya MLA
Nasution, Arman, Hakim,, Ir,, M.Eng, Dkk.
"Entrepreneurship : Membangun Spirit Teknopreneurship".
yogyakarta:
ANDI,
2007.
Text.