APA (7th ed.) Citation

Murray, W., & Aitchison, M. (1978). Our friends. Ladybird Books.

Chicago Style (17th ed.) Citation

Murray, William, and Martin Aitchison. Our Friends. Loughborough [England]: Ladybird Books, 1978.

MLA (9th ed.) Citation

Murray, William, and Martin Aitchison. Our Friends. Ladybird Books, 1978.