Leland, J. (2005). Aliens in the backyard: Plant and animal imports into America. University of South Carolina Press.
Chicago-referens (17:e uppl.)Leland, John. Aliens in the Backyard: Plant and Animal Imports into America. Columbia, SC: University of South Carolina Press, 2005.
MLA-referens (9:e uppl.)Leland, John. Aliens in the Backyard: Plant and Animal Imports into America. University of South Carolina Press, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.