Cita APA (7th ed.)

SAGE Knowledge (Online service), Aitken, S. C., & Valentine, G. (2006). Approaches to human geography. SAGE.

Cita Chicago (17th ed.)

SAGE Knowledge (Online service), Stuart C. Aitken, i Gill Valentine. Approaches to Human Geography. London: SAGE, 2006.

Cita MLA (9th ed.)

SAGE Knowledge (Online service), et al. Approaches to Human Geography. SAGE, 2006.