Gaya APA

GRAY, H, D, S, B, R., Geology, . (1996). Slope stabilization: biotechnical and soil bioengineering. A practical guide for erosion control . : John Wiley & Sons, Inc..

Gaya MLA

GRAY, H., Donald;, SOTIR,, B., Robbin., Geology, . "Slope stabilization: biotechnical and soil bioengineering. A practical guide for erosion control". : John Wiley & Sons, Inc., 1996. Buku.