APA

Avery E., Dorsey J. O. & Sickels V. A. (1928). First principles of speech training. New York: D. Appleton and Company.

Chicago

Avery Elizabeth, Dorsey Jane Olive and Sickels Vera Abigail. 1928. First principles of speech training. New York: D. Appleton and Company.

Harvard

Avery E., Dorsey J. O. and Sickels V. A. (1928). First principles of speech training. New York: D. Appleton and Company.

MLA

Avery Elizabeth, Dorsey Jane Olive and Sickels Vera Abigail. First principles of speech training. New York: D. Appleton and Company. 1928.