APA

Okun M., Bronz S. H., Murphy W. N. & Jennings H. P. (1973). The challenge of America. New York: Holt, Rinehart and Winston.

Chicago

Okun Mitchell, Bronz Stephen H, Murphy William N and Jennings Helene P. 1973. The challenge of America. New York: Holt, Rinehart and Winston.

Harvard

Okun M., Bronz S. H., Murphy W. N. and Jennings H. P. (1973). The challenge of America. New York: Holt, Rinehart and Winston.

MLA

Okun Mitchell, Bronz Stephen H, Murphy William N and Jennings Helene P. The challenge of America. New York: Holt, Rinehart and Winston. 1973.