Coffin, B. (1980). Coffin's overtones of bel canto: Phonetic basis of artistic singing with 100 chromatic vowel-chart exercises / by Berton Coffin. Scarecrow Press.
Цитирование в стиле Чикаго (17-е изд.)Coffin, Berton. Coffin's Overtones of Bel Canto: Phonetic Basis of Artistic Singing with 100 Chromatic Vowel-chart Exercises / by Berton Coffin. Metuchen, N.J.: Scarecrow Press, 1980.
Цитирование MLA (8-е изд.)Coffin, Berton. Coffin's Overtones of Bel Canto: Phonetic Basis of Artistic Singing with 100 Chromatic Vowel-chart Exercises / by Berton Coffin. Scarecrow Press, 1980.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.