Clifford, N., French, S., & Valentine, G. (2010). Key methods in Geography (2a. ed.). Sage.
Chicago-čujuhus (17. p.)Clifford, Nicholas, Shaun French, juo Gill Valentine. Key Methods in Geography. 2a. ed. Los Angeles: Sage, 2010.
MLA-čujuhus (9. p.)Clifford, Nicholas, et al. Key Methods in Geography. 2a. ed. Sage, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.