APA (7th ed.) Citation

O'Nell, R., Kingbury, R., & Yeadon, T. (1971). Kernel lessons intermediate. Longman.

Chicago Style (17th ed.) Citation

O'Nell, Robert, Roy Kingbury, and Tony Yeadon. Kernel Lessons Intermediate. Essex, Eng: Longman, 1971.

MLA (9th ed.) Citation

O'Nell, Robert, et al. Kernel Lessons Intermediate. Longman, 1971.