APA

Soars J., . (2000). New headway: English course. Estados Unidos: Oxford university press.

Chicago

Soars John, . 2000. New headway: English course. Estados Unidos: Oxford university press.

Harvard

Soars J., . (2000). New headway: English course. Estados Unidos: Oxford university press.

MLA

Soars John, . New headway: English course. Estados Unidos: Oxford university press. 2000.