Sperry, L., & Hess, L. R. (1974). Contact counseling: Communication skills for people in organizations. Addison-Wesley Publishing Company.
Citação do estilo Chicago (17ª ed.)Sperry, Len, e Lee R. Hess. Contact Counseling: Communication Skills for People in Organizations. Massachusetts: Addison-Wesley Publishing Company, 1974.
Citação MLA (9ª ed.)Sperry, Len, e Lee R. Hess. Contact Counseling: Communication Skills for People in Organizations. Addison-Wesley Publishing Company, 1974.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.