Tidswell,W.V. (1971). Quantative methods: An approach to socio-economic geography. University Tutorial Press.
Chicago-viite (17. p.)Tidswell,W.V. Quantative Methods: An Approach to Socio-economic Geography. London: University Tutorial Press, 1971.
MLA-viite (9. p.)Tidswell,W.V. Quantative Methods: An Approach to Socio-economic Geography. University Tutorial Press, 1971.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.