Cita APA (7a ed.)

Werner, E. D., & Friedman, H. P. (2010). Landslides: Causes, types and effects. Nova Science Publishers, Inc..

Cita Chicago Style (17a ed.)

Werner, Ernest D., y Hugh P. Friedman. Landslides: Causes, Types and Effects. New York: Nova Science Publishers, Inc., 2010.

Cita MLA (8a ed.)

Werner, Ernest D., y Hugh P. Friedman. Landslides: Causes, Types and Effects. Nova Science Publishers, Inc., 2010.