Gaya APA

Sinek, S., Purwoko, S. (2023). Start With Why : How Great Leaders Inspire Everyone To Take Action (Cet. 15). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Sinek, Simon., Purwoko, Susi. "Start With Why : How Great Leaders Inspire Everyone To Take Action". Cet. 15 Jakarta: Gramedia Pustaka Utama, 2023. Text.