Black, J. W., & Irwin, R. B. (1969). Voice and diction phonation and phonology. Charles E. Merrill.
Cita Chicago (17th ed.)Black, John W., i Ruth B. Irwin. Voice and Diction Phonation and Phonology. Charles E. Merrill, 1969.
Cita MLA (9th ed.)Black, John W., i Ruth B. Irwin. Voice and Diction Phonation and Phonology. Charles E. Merrill, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.