Burt, J. M., Barber, G. M., & Rigby, D. L. (2009). Elementary statistics for geographers (3rd ed.). New York: Guilford Press.
Παραπομπή Chicago StyleBurt, James M., Gerald M. Barber, and David L. Rigby. Elementary Statistics for Geographers. 3rd ed. New York: Guilford Press, 2009.
Παραπομπή MLABurt, James M., Gerald M. Barber, and David L. Rigby. Elementary Statistics for Geographers. 3rd ed. New York: Guilford Press, 2009.
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