Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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