Gaya APA
Bland, D, J, 1. et al (2020).
Testing business ideas : strategyzer.com/test .
Jakarta:
PT Elex Media Komputindo.
Gaya MLA
Bland, David, J.,, 1976-. et al.
"Testing business ideas : strategyzer.com/test".
Jakarta:
PT Elex Media Komputindo,
2020.
Text.