Phillips, R., & Johns, J. (2013). Fieldwork for human geography. SAGE.
Lua i Stíl Chicago (17ú heag.)Phillips, Richard, agus Jennifer Johns. Fieldwork for Human Geography. London: SAGE, 2013.
Lua MLA (9ú heag.)Phillips, Richard, agus Jennifer Johns. Fieldwork for Human Geography. SAGE, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.