Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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