APA (7th ed.) Citation

Porter, K. B., May, I. M., Lewis, R. D., & Pfluger, J. (1975). Agricultural oral history interview with Kenneth B. Porter. [publisher not identified].

Chicago Style (17th ed.) Citation

Porter, Kenneth B., Irvin M. May, R. D. Lewis, and Jean Pfluger. Agricultural Oral History Interview with Kenneth B. Porter. [Place of publication not identified]: [publisher not identified], 1975.

MLA (9th ed.) Citation

Porter, Kenneth B., et al. Agricultural Oral History Interview with Kenneth B. Porter. [publisher not identified], 1975.