APA

K. Werner P., . (1996). A communicative grammar. México: McGraw-Hill.

Chicago

K. Werner Patricia, . 1996. A communicative grammar. México: McGraw-Hill.

Harvard

K. Werner P., . (1996). A communicative grammar. México: McGraw-Hill.

MLA

K. Werner Patricia, . A communicative grammar. México: McGraw-Hill. 1996.