APA (7th ed.) Citation

Gao, Y., Xu, Z., Wang, L., & Xu, H. (2015). Preface. American Institute of Mathematical Sciences.

Chicago Style (17th ed.) Citation

Gao, Y., Z. Xu, Lei Wang, and Honglei Xu. Preface. American Institute of Mathematical Sciences, 2015.

MLA (9th ed.) Citation

Gao, Y., et al. Preface. American Institute of Mathematical Sciences, 2015.