APA (7th ed.) Citation

Murray, W., & Aitchison, M. (1966). Learning is fun. Ladybird Books.

Chicago Style (17th ed.) Citation

Murray, William, and Martin Aitchison. Learning Is Fun. Loughborough [England]: Ladybird Books, 1966.

MLA (9th ed.) Citation

Murray, William, and Martin Aitchison. Learning Is Fun. Ladybird Books, 1966.