Gaya APA

Filbert, R. (2015). Passive income strategy: the secret of financial freedom (Ed.1; Cet.1). Jakarta: Elex Media Komputindo.

Gaya MLA

Filbert, Ryan. "Passive income strategy: the secret of financial freedom". Ed.1; Cet.1 Jakarta: Elex Media Komputindo, 2015. Text.