Gaya APA

Valentine, S, L, H, S, P, R, G., Arsjad, S, M. (2003). Key concepts in geography . London: SAGE Publication.

Gaya MLA

Valentine, Sarah, L., Holloway;, Stephen, P., Rice;, Giu., Arsjad, Suriadi, M.. "Key concepts in geography". London: SAGE Publication, 2003. Text.