APA

Gray D. H., Sotir R. B. & John Wiley & Sons. (1996). Biotechnical and soil bioengineering slope stabilization. New York: John Wiley & Sons, Inc.

Chicago

Gray Donald H, Sotir Robbin B and John Wiley & Sons. 1996. Biotechnical and soil bioengineering slope stabilization. New York: John Wiley & Sons, Inc.

Harvard

Gray D. H., Sotir R. B. and John Wiley & Sons. (1996). Biotechnical and soil bioengineering slope stabilization. New York: John Wiley & Sons, Inc.

MLA

Gray Donald H, Sotir Robbin B and John Wiley & Sons. Biotechnical and soil bioengineering slope stabilization. New York: John Wiley & Sons, Inc. 1996.