Gaya APA

Sukamulja, P, D, S., aoasterwalder, D, J, B, A. (). Testing Business Ideas . Jakarta: Elex Media Komputindo.

Gaya MLA

Sukamulja, Prof., Dr., Sukmawati., aoasterwalder, David, J., Bland,, Alex. "Testing Business Ideas". Jakarta: Elex Media Komputindo, . Text.