Archer, J. E., & Dalton, T. H. (1968). Fieldwork in geography. Batsford.
Lua i Stíl Chicago (17ú heag.)Archer, James Eric, agus T. H. Dalton. Fieldwork in Geography. London: Batsford, 1968.
Lua MLA (9ú heag.)Archer, James Eric, agus T. H. Dalton. Fieldwork in Geography. Batsford, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.