APA (7th ed.) Citation

John & Paull, D. (1981). Nature takes shapes. Ladybird Books.

Chicago Style (17th ed.) Citation

John and Dorothy Paull. Nature Takes Shapes. England: Ladybird Books, 1981.

MLA (9th ed.) Citation

John and Dorothy Paull. Nature Takes Shapes. Ladybird Books, 1981.

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