APA (7th ed.) Citation

Proysen, A., & Berg, B. (1975). Mrs Pepperpot's Busy Day. Puffin Books.

Chicago Style (17th ed.) Citation

Proysen, Alf, and Bjorn Berg. Mrs Pepperpot's Busy Day. England: Puffin Books, 1975.

MLA (9th ed.) Citation

Proysen, Alf, and Bjorn Berg. Mrs Pepperpot's Busy Day. Puffin Books, 1975.

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