Cita APA (7a ed.)

O'Neill, R., Yeadon, T., & Kingsbury, R. (1973). Kernel lessons intermediate: Tests : teacher's book ([1973 new imp.].). Longman.

Cita Chicago Style (17a ed.)

O'Neill, Robert, Tony Yeadon, y Roy Kingsbury. Kernel Lessons Intermediate: Tests : Teacher's Book. [1973 new imp.]. London: Longman, 1973.

Cita MLA (9a ed.)

O'Neill, Robert, et al. Kernel Lessons Intermediate: Tests : Teacher's Book. [1973 new imp.]. Longman, 1973.