Gaya APA
Putra, I, M., Ishartadi, A. (2019).
Business Model and Business Plan di Era 4.0 (-1).
Yogyakarta:
Quadrant.
Gaya MLA
Putra, Indra, Mahardika., Ishartadi, Arif.
"Business Model and Business Plan di Era 4.0".
-1
Yogyakarta:
Quadrant,
2019.
Text.