Cita APA (7a ed.)

Spencer, M. H. (1983). Contemporary Economics (5th. ed.). Worth Publishers.

Cita Chicago Style (17a ed.)

Spencer, Milton H. Contemporary Economics. 5th. ed. New York: Worth Publishers, 1983.

Cita MLA (9a ed.)

Spencer, Milton H. Contemporary Economics. 5th. ed. Worth Publishers, 1983.