Gaya APA

Boone, D, R., McFarlane, S, C. (1999). The Voice and Voice Therapy 6th Edition (6). United State of America: Allyn & Bacon.

Gaya MLA

Boone, Daniel, R.., McFarlane, Stephen, C.. "The Voice and Voice Therapy 6th Edition". 6 United State of America: Allyn & Bacon, 1999. Text.