Cita APA (7a ed.)

O'Neill, R., Kingsbury, R., & Yeadon, T. (1970). Kernel lessons intermediate: Teacher's book. Longman.

Cita Chicago Style (17a ed.)

O'Neill, Robert, Roy Kingsbury, y Tony Yeadon. Kernel Lessons Intermediate: Teacher's Book. London: Longman, 1970.

Cita MLA (9a ed.)

O'Neill, Robert, et al. Kernel Lessons Intermediate: Teacher's Book. Longman, 1970.