Lua APA (7ú heag.)

Christopherson, R. W. (1998). Elemental geosystems (Second Edition.). Prentice Hall.

Lua i Stíl Chicago (17ú heag.)

Christopherson, Robert W. Elemental Geosystems. Second Edition. New Jersey: Prentice Hall, 1998.

Lua MLA (9ú heag.)

Christopherson, Robert W. Elemental Geosystems. Second Edition. Prentice Hall, 1998.

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