Cita APA (7th ed.)

Thoman, R. S., Yeates, M., & Conkling, E. C. (1968). The geography of economic activity (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Thoman, Richard S., Maurice Yeates, i Edgar C. Conkling. The Geography of Economic Activity. 2nd ed. New York: McGraw-Hill, 1968.

Cita MLA (8th ed.)

Thoman, Richard S., et al. The Geography of Economic Activity. 2nd ed. McGraw-Hill, 1968.