Wallace, R. F. (1956). An evaluation of wildlife resources in the State of Washington. State College of Washington, School of Economics and Business, Bureau of Economic and Business Research.
Chicago-referens (17:e uppl.)Wallace, Robert F. An Evaluation of Wildlife Resources in the State of Washington. Pullman: State College of Washington, School of Economics and Business, Bureau of Economic and Business Research, 1956.
MLA-referens (8:e uppl.)Wallace, Robert F. An Evaluation of Wildlife Resources in the State of Washington. State College of Washington, School of Economics and Business, Bureau of Economic and Business Research, 1956.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.