APA-referens

 Worrell, W. A. (2011).  Solid waste engineering, si.  South-Western, Cengage Learning.

Chicago-stil citat

 Worrell, William A.  Solid Waste Engineering, Si.  South-Western, Cengage Learning, 2011.

MLA-referens

 Worrell, William A.  Solid Waste Engineering, Si.  South-Western, Cengage Learning, 2011.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.