APA (7th ed.) Citation

Parker, S., Chen, K. K., & Bull, B. (1990). Simple chemistry. Kingfisher Books.

Chicago Style (17th ed.) Citation

Parker, Steve, Kuo Kang Chen, and Bull Bull. Simple Chemistry. London: Kingfisher Books, 1990.

MLA (9th ed.) Citation

Parker, Steve, et al. Simple Chemistry. Kingfisher Books, 1990.