Cita APA

Barzun, J., & Graff, H. F. (1977). THe modern researcher (3rd ed.). Harcourt B. J..

Citación estilo Chicago

Barzun, Jacques, and Henry F. Graff. THe Modern Researcher. 3rd ed. New York: Harcourt B. J., 1977.

Cita MLA

Barzun, Jacques, and Henry F. Graff. THe Modern Researcher. 3rd ed. Harcourt B. J., 1977.