Cita APA

Riegel, R. E. (1941). An introduction to the social sciences (1a. ed.). New York: D. Appleton-Century COMPANY.

Citación estilo Chicago

Riegel, Robert E. An Introduction to the Social Sciences. 1a. ed. New York: D. Appleton-Century COMPANY, 1941.

Cita MLA

Riegel, Robert E. An Introduction to the Social Sciences. 1a. ed. New York: D. Appleton-Century COMPANY, 1941.