Cita APA

O'Neill, R., Yeadon, T., & Kingsbury, R. (1971). Kernel lessons intermediate: Tests : students' book ([2nd. imp.].). London: Longman.

Citación estilo Chicago

O'Neill, Robert, Tony Yeadon, and Roy Kingsbury. Kernel Lessons Intermediate: Tests : Students' Book. [2nd. imp.]. London: Longman, 1971.

Cita MLA

O'Neill, Robert, Tony Yeadon, and Roy Kingsbury. Kernel Lessons Intermediate: Tests : Students' Book. [2nd. imp.]. London: Longman, 1971.