Cita APA (7th ed.)

Berry, B. J. L., Conkling, E. C., & Ray, D. M. (1976). The geography of economic systems. Prentice-Hall.

Cita Chicago (17th ed.)

Berry, Brian J. L., Edgar C. Conkling, i D. Michael Ray. The Geography of Economic Systems. Englewood Cliffs, N.J: Prentice-Hall, 1976.

Cita MLA (9th ed.)

Berry, Brian J. L., et al. The Geography of Economic Systems. Prentice-Hall, 1976.