APA (7th ed.) Citation

Teachers for Travellers (London), Cleary, B. I., & Teachers for Travellers. (1985). How many trailers? Teachers for Travellers.

Chicago Style (17th ed.) Citation

Teachers for Travellers (London), Bernadette Illustrator Cleary, and Teachers for Travellers. How Many Trailers? London: Teachers for Travellers, 1985.

MLA (8th ed.) Citation

Teachers for Travellers (London), et al. How Many Trailers? Teachers for Travellers, 1985.