Luanna taifid

Lua APA (7ú heag.)
Lesley J. Peter. (1888). Atlas to accompany part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham.
Lua i Stíl Chicago (17ú heag.)
Lesley J. Peter. Atlas to Accompany Part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham, 1888.
Lua MLA (9ú heag.)
Lesley J. Peter. Atlas to Accompany Part 4, Annual Report of the Geological Survey of Pennsylvania for 1886. William A. Ingham, 1888.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.