APA (7th ed.) Citation

National University Extension Association & Pitchell, R. J. (1973). A directory of U.S. college and university degrees for part-time students. [publisher not identified].

Chicago Style (17th ed.) Citation

National University Extension Association and Robert J. Pitchell. A Directory of U.S. College and University Degrees for Part-time Students. Washington: [publisher not identified], 1973.

MLA (9th ed.) Citation

National University Extension Association and Robert J. Pitchell. A Directory of U.S. College and University Degrees for Part-time Students. [publisher not identified], 1973.