Spellman, B. J. (1960). Laboratory exercises in physical geography (Revised ed.). St. Norbert College.
Lua i Stíl Chicago (17ú heag.)Spellman, Boniface J. Laboratory Exercises in Physical Geography. Revised ed. [De Pere, Wis.]: St. Norbert College, 1960.
Lua MLA (8ú heag.)Spellman, Boniface J. Laboratory Exercises in Physical Geography. Revised ed. St. Norbert College, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.