Richard Phillips & Jennifer Johns. (2012). Fieldwork for human geography. Sage.
Chicago Style aipamenaRichard Phillips and Jennifer Johns. Fieldwork for Human Geography. Los Angeles: Sage, 2012.
MLA aipamenaRichard Phillips and Jennifer Johns. Fieldwork for Human Geography. Sage, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.