APA (7th ed.) Citation

Kemp, P., & Wall, D. (1990). A green manifesto for the 1990's. Penguin Books.

Chicago Style (17th ed.) Citation

Kemp, Penny, and Derek Wall. A Green Manifesto for the 1990's. London: Penguin Books, 1990.

MLA (9th ed.) Citation

Kemp, Penny, and Derek Wall. A Green Manifesto for the 1990's. Penguin Books, 1990.

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