Cita APA (7th ed.)
Viney, P., & Hartley, B. (1990). Streamline English Directions: An intensive English course for upper intermedite students (1a. ed.). Oxford University Press.
Cita Chicago (17th ed.)
Viney, Peter, i Bernard Hartley. Streamline English Directions: An Intensive English Course for Upper Intermedite Students. 1a. ed. Buenos Aires: Oxford University Press, 1990.
Cita MLA (9th ed.)
Viney, Peter, i Bernard Hartley. Streamline English Directions: An Intensive English Course for Upper Intermedite Students. 1a. ed. Oxford University Press, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.