Lua APA (7ú heag.)

Knowles, R. (1981). Economic and Social Geography (Fourth Edition). ELSEVIER.

Lua i Stíl Chicago (17ú heag.)

Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.

Lua MLA (8ú heag.)

Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.