APA

Cortina R. D. d. l., . (1954). Cortin's english in english =. New York: Cortina.

Chicago

Cortina R Diez de la, . 1954. Cortin's english in english =. New York: Cortina.

Harvard

Cortina R. D. d. l., . (1954). Cortin's english in english =. New York: Cortina.

MLA

Cortina R Diez de la, . Cortin's english in english =. New York: Cortina. 1954.