Citazione Stile APA (7a Edizione)

Barber, G. M. (1988). Elementary statistics for geographers. The Guilford pr.

Citazione stile Chigago Style (17a edizione)

Barber, Gerald M. Elementary Statistics for Geographers. New York: The Guilford pr, 1988.

Citatione MLA (9a ed.)

Barber, Gerald M. Elementary Statistics for Geographers. The Guilford pr, 1988.