APA (7th ed.) Citation

Murray, W., & Wingfield, J. H. Say the sound. Ladybird Books.

Chicago Style (17th ed.) Citation

Murray, W., and J H. Wingfield. Say the Sound. Loughborough: Ladybird Books.

MLA (9th ed.) Citation

Murray, W., and J H. Wingfield. Say the Sound. Ladybird Books.

Warning: These citations may not always be 100% accurate.