APA (7th ed.) Citation

Jill Murphy. (1978). The Worst Witch. Penguin Books.

Chicago Style (17th ed.) Citation

Jill Murphy. The Worst Witch. Penguin Books, 1978.

MLA (9th ed.) Citation

Jill Murphy. The Worst Witch. Penguin Books, 1978.

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