Cita APA (7a ed.)

Waugh, A., & Byrne, J. F. (1976). The four by four english course: Sections 6 7 8 9 10. Anne Waugh ; John Byrne. Britannia School Books.

Cita Chicago Style (17a ed.)

Waugh, Anne, y John Ferro Byrne. The Four by Four English Course: Sections 6 7 8 9 10. Anne Waugh ; John Byrne. Genova: Britannia School Books, 1976.

Cita MLA (9a ed.)

Waugh, Anne, y John Ferro Byrne. The Four by Four English Course: Sections 6 7 8 9 10. Anne Waugh ; John Byrne. Britannia School Books, 1976.