Gaya APA
BLAND, D, J., OSTERWALDER, A.
(2020).
TESTING BUSINESS 1DEAS
.
JAKARTA:
PT. ELEX MEDIA KOMPUTINDO.
Gaya MLA
BLAND, DAVID, J.., OSTERWALDER, ALEX.
"TESTING BUSINESS 1DEAS".
JAKARTA:
PT. ELEX MEDIA KOMPUTINDO,
2020.
Art Original.