APA (7th ed.) Citation

Wirt, F. M. (1970). Introductory problems in political research. Prentice-Hall.

Chicago Style (17th ed.) Citation

Wirt, Frederick M. Introductory Problems in Political Research. Englewood Cliffs, N. J: Prentice-Hall, 1970.

MLA (9th ed.) Citation

Wirt, Frederick M. Introductory Problems in Political Research. Prentice-Hall, 1970.