APA (7th ed.) Citation

JEnner, E., Wolmar, C., & Christoph, J. (2021). Trains. Ladybird Books.

Chicago Style (17th ed.) Citation

JEnner, Elizabeth, Christin Wolmar, and Jamey Christoph. Trains. London: Ladybird Books, 2021.

MLA (9th ed.) Citation

JEnner, Elizabeth, et al. Trains. Ladybird Books, 2021.