APA

Sapir E., . (1949). Language: an introduction to the study of speech. New York: Harcourt, Brace and Company.

Chicago

Sapir Edward, . 1949. Language: an introduction to the study of speech. New York: Harcourt, Brace and Company.

Harvard

Sapir E., . (1949). Language: an introduction to the study of speech. New York: Harcourt, Brace and Company.

MLA

Sapir Edward, . Language: an introduction to the study of speech. New York: Harcourt, Brace and Company. 1949.