Gaya APA
Putra, I, M., Ishartadi, A. (2019).
Business model and business plan di era 4.0 (Cet.1).
Yogyakarta:
Quadrant.
Gaya MLA
Putra, Indra, Mahardika., Ishartadi, Arif.
"Business model and business plan di era 4.0".
Cet.1
Yogyakarta:
Quadrant,
2019.
Text.