APA

Birmingham A. I., Krapp G. P., . (1922). First lessons in speech improvement. New York: C. Scribner's Sons.

Chicago

Birmingham Anna I, Krapp George Philip, . 1922. First lessons in speech improvement. New York: C. Scribner's Sons.

Harvard

Birmingham A. I., Krapp G. P., . (1922). First lessons in speech improvement. New York: C. Scribner's Sons.

MLA

Birmingham Anna I, Krapp George Philip, . First lessons in speech improvement. New York: C. Scribner's Sons. 1922.