Strange, D., & Hall, D. (2001). Pacesetter: Pre intermediate (1a. ed. 3a. reimp.). Oxford.

Strange, Derek, and Diane Hall. Pacesetter: Pre Intermediate. 1a. ed. 3a. reimp. New York: Oxford, 2001.

Strange, Derek, and Diane Hall. Pacesetter: Pre Intermediate. 1a. ed. 3a. reimp. Oxford, 2001.