Gaya APA
Putra, I, M., Ishartadi, A.
(2018).
Business Model And Business Plan Di Era 4.0
.
Yogyakarta:
Quadrant.
Gaya MLA
Putra, Indra, Mahardika., Ishartadi, Arif.
"Business Model And Business Plan Di Era 4.0".
Yogyakarta:
Quadrant,
2018.
Text.