Παραπομπή APA

Ian Douglas, Chris Perkins, & Richard Huggett. (2007). Companion encyclopaedia of geography from local to global (v.1) (2nd.). Routledge.

Παραπομπή Chicago Style

Ian Douglas, Chris Perkins, και Richard Huggett. Companion Encyclopaedia of Geography from Local to Global (v.1). 2nd. London: Routledge, 2007.

Παραπομπή MLA

Ian Douglas, et al. Companion Encyclopaedia of Geography from Local to Global (v.1). 2nd. Routledge, 2007.