APA (7th ed.) Citation

Harker, J., & Galloway, R. Busy tractor. Ladybird Books.

Chicago Style (17th ed.) Citation

Harker, Jillian, and Ruth Galloway. Busy Tractor. London: Ladybird Books.

MLA (9th ed.) Citation

Harker, Jillian, and Ruth Galloway. Busy Tractor. Ladybird Books.

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