MLA

Richefeu, Vincent; Villard, Pascal, and Pascal Villard. Modeling Gravity Hazards From Rockfalls to Landslides. Elsevier, 2016.

APA

Richefeu, P., & Villard, P. (2016). Modeling gravity hazards from Rockfalls to Landslides. Elsevier.

Chicago

Richefeu, Vincent; Villard, Pascal, and Pascal Villard. Modeling Gravity Hazards From Rockfalls to Landslides. : Elsevier, 2016.