Lua APA (7ú heag.)
Bierman, P. (2019). Key Concepts in Geomorphology (2nd Ed.). W. H. Freeman.
Lua i Stíl Chicago (17ú heag.)
Bierman, Paul. Key Concepts in Geomorphology. 2nd Ed. New York: W. H. Freeman, 2019.
Lua MLA (9ú heag.)
Bierman, Paul. Key Concepts in Geomorphology. 2nd Ed. W. H. Freeman, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.