Cita APA (7a ed.)

Hinton, M., & Marsden, R. (1985). Options advanced english. Nelson.

Cita Chicago Style (17a ed.)

Hinton, Michael, y Robert Marsden. Options Advanced English. Edinburgh: Nelson, 1985.

Cita MLA (8a ed.)

Hinton, Michael, y Robert Marsden. Options Advanced English. Nelson, 1985.