Gaya APA
Bland, D, J., Osterwalder, A.
(2020).
TESTING BUSINESS IDEAS
.
Yogyakarta:
ANDI OFFSET.
Gaya MLA
Bland, David, J.., Osterwalder, Alex.
"TESTING BUSINESS IDEAS".
Yogyakarta:
ANDI OFFSET,
2020.
Text.