Cita APA (7th ed.)

Walford, N. (2011). Practical statistics for geographers and earth scientists. Wiley-Blackwell.

Cita Chicago (17th ed.)

Walford, Nigel. Practical Statistics for Geographers and Earth Scientists. Chichester, West Sussex: Wiley-Blackwell, 2011.

Cita MLA (9th ed.)

Walford, Nigel. Practical Statistics for Geographers and Earth Scientists. Wiley-Blackwell, 2011.