Lua APA (7ú heag.)
Gilbert, O. L. (1991). The ecology of urban habitats. Chapman and Hall.
Lua i Stíl Chicago (17ú heag.)
Gilbert, O. L. The Ecology of Urban Habitats. London ; New York: Chapman and Hall, 1991.
Lua MLA (9ú heag.)
Gilbert, O. L. The Ecology of Urban Habitats. Chapman and Hall, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.