Gaya APA

Covey, S, R. et al (2015). The 7 habits of highly effective people (Cet. 1). Jakarta: Dunamis Intra Sarana.

Gaya MLA

Covey, Stephen, R. et al. "The 7 habits of highly effective people". Cet. 1 Jakarta: Dunamis Intra Sarana, 2015. Text.