APA (7th ed.) Citation

Murray, W., & Wingfield, J. H. More sounds to say. Ladybird Books Ltd.

Chicago Style (17th ed.) Citation

Murray, W., and J. H. Wingfield. More Sounds to Say. Loughborough: Ladybird Books Ltd.

MLA (9th ed.) Citation

Murray, W., and J. H. Wingfield. More Sounds to Say. Ladybird Books Ltd.