APA (7th ed.) Citation

Ulvan, A., Sukmana, I., & Kurniawan, D. (2018). Preface.

Chicago Style (17th ed.) Citation

Ulvan, A., I. Sukmana, and Denni Kurniawan. Preface. 2018.

MLA (9th ed.) Citation

Ulvan, A., et al. Preface. 2018.