APA (7th ed.) Citation

Covey, S., England, B., & Whitman, B. (2010). Predictable result in unpredictable times; sukses setiap saat. PTS Professional.

Chicago Style (17th ed.) Citation

Covey, Stephen, Breck England, and Bob Whitman. Predictable Result in Unpredictable Times; Sukses Setiap Saat. Selangor: PTS Professional, 2010.

MLA (8th ed.) Citation

Covey, Stephen, et al. Predictable Result in Unpredictable Times; Sukses Setiap Saat. PTS Professional, 2010.