Cita APA

O'Neill, R., Kingsbury, R., & Yeadon, T. (1971). Kernel lessons intermediate: Student's book. Longman Group Limited.

Citación estilo Chicago

O'Neill, Robert, Roy Kingsbury, and Tony Yeadon. Kernel Lessons Intermediate: Student's Book. Londres: Longman Group Limited, 1971.

Cita MLA

O'Neill, Robert, et al. Kernel Lessons Intermediate: Student's Book. Longman Group Limited, 1971.