Lua APA (7ú heag.)

(1914). Coal age. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Coal Age. New York: McGraw-Hill, 1914.

Lua MLA (9ú heag.)

Coal Age. McGraw-Hill, 1914.

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