Cita APA (7a ed.)

Royal, R. F., & Schutt, S. R. (1976). The gentle art of interviewing and interrogation: A professional manual and guide. Prentice-Hall.

Cita Chicago Style (17a ed.)

Royal, Robert F., y Steven R. Schutt. The Gentle Art of Interviewing and Interrogation: A Professional Manual and Guide. Englewood Cliffs, N.J: Prentice-Hall, 1976.

Cita MLA (9a ed.)

Royal, Robert F., y Steven R. Schutt. The Gentle Art of Interviewing and Interrogation: A Professional Manual and Guide. Prentice-Hall, 1976.