Gaya APA

Gray, D, D., Sotir, R, B. (). Slope Stabilization: A Practical Guide for Erosion Control . New York: John Wiley & Sons, Inc..

Gaya MLA

Gray, Donald, D.., Sotir, Robbin, B.. "Slope Stabilization: A Practical Guide for Erosion Control". New York: John Wiley & Sons, Inc., . Text.