APA

Barzun J., I.Graff H. F. c., .The modern researcher. New York: Harcourt.

Chicago

Barzun Jacquer, I.Graff Henry F coaut, .The modern researcher. New York: Harcourt.

Harvard

Barzun J., I.Graff H. F. c., .The modern researcher. New York: Harcourt.

MLA

Barzun Jacquer, I.Graff Henry F coaut, .New York: Harcourt. .