APA

Twain M., De Voto B. A., . (1946). The portable Mark Twain. New York: The Viking press.

Chicago

Twain Mark, De Voto Bernard Augustine, . 1946. The portable Mark Twain. New York: The Viking press.

Harvard

Twain M., De Voto B. A., . (1946). The portable Mark Twain. New York: The Viking press.

MLA

Twain Mark, De Voto Bernard Augustine, . The portable Mark Twain. New York: The Viking press. 1946.