Lua APA (7ú heag.)

Langan, J. (1988). English skills with readings (3rd ed.). McGraw hill.

Lua i Stíl Chicago (17ú heag.)

Langan, John. English Skills with Readings. 3rd ed. New York: McGraw hill, 1988.

Lua MLA (9ú heag.)

Langan, John. English Skills with Readings. 3rd ed. McGraw hill, 1988.

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