Gaya APA

Landforming : an environmental approach to hillside development, mine reclamation and watershed restoration / Horst J, Schor : Donald H. Gray. (2007). : Canada : John Wiley & Sons, Inc.

Gaya MLA

Landforming : an environmental approach to hillside development, mine reclamation and watershed restoration / Horst J, Schor : Donald H. Gray. . : Canada : John Wiley & Sons, Inc, 2007. Text.