APA (7th ed.) Citation

Irwin,L,Vincent, & Sean king. (1971). Test your Chemistry. Penguin books.

Chicago Style (17th ed.) Citation

Irwin,L,Vincent, and Sean king. Test Your Chemistry. USA: Penguin books, 1971.

MLA (9th ed.) Citation

Irwin,L,Vincent, and Sean king. Test Your Chemistry. Penguin books, 1971.

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