APA

Barzun J., Graff H. F., . (1957). The modern researcher. New York: Harcourt, Brace.

Chicago

Barzun Jacques, Graff Henry Franklin, . 1957. The modern researcher. New York: Harcourt, Brace.

Harvard

Barzun J., Graff H. F., . (1957). The modern researcher. New York: Harcourt, Brace.

MLA

Barzun Jacques, Graff Henry Franklin, . The modern researcher. New York: Harcourt, Brace. 1957.