APA (7th ed.) Citation

Johnston, J. (1999). The invisible worm. Penguin.

Chicago Style (17th ed.) Citation

Johnston, Jennifer. The Invisible Worm. Harmondsworth: Penguin, 1999.

MLA (9th ed.) Citation

Johnston, Jennifer. The Invisible Worm. Penguin, 1999.

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