Citazione Stile APA (7a Edizione)

Boyce, R. R. (1982). Geographic perspectives on global problems: An introduction to geography. John Wiley and Sons.

Citazione stile Chigago Style (17a edizione)

Boyce, Ronald Reed. Geographic Perspectives on Global Problems: An Introduction to Geography. New York: John Wiley and Sons, 1982.

Citatione MLA (9a ed.)

Boyce, Ronald Reed. Geographic Perspectives on Global Problems: An Introduction to Geography. John Wiley and Sons, 1982.