Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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