Cita APA (7a ed.)

O'Neill, R., Kingsbury, R., & Yeadon, T. (1974). Kernel lessons intermediate: Tests teacher`s book. Longman.

Cita Chicago Style (17a ed.)

O'Neill, Robert, Roy Kingsbury, y Tony Yeadon. Kernel Lessons Intermediate: Tests Teacher`s Book. London: Longman, 1974.

Cita MLA (8a ed.)

O'Neill, Robert, et al. Kernel Lessons Intermediate: Tests Teacher`s Book. Longman, 1974.