Gaya APA

Kiyosaki, R, T., Yusuf, S. (2018). The Business of the 21st Century . JAKARTA: PT. Gramedia Pustaka Utama.

Gaya MLA

Kiyosaki, Robert, T.., Yusuf, Sugianto. "The Business of the 21st Century". JAKARTA: PT. Gramedia Pustaka Utama, 2018. Text.