APA (7th ed.) Citation

Butterworth, B. Tommy's Tuba. Ladybird Books.

Chicago Style (17th ed.) Citation

Butterworth, Ben. Tommy's Tuba. England: Ladybird Books.

MLA (9th ed.) Citation

Butterworth, Ben. Tommy's Tuba. Ladybird Books.

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