APA (7th ed.) Citation

Elkington, J., & Hailes, J. (1989). The green consumer guide. Penguin Books.

Chicago Style (17th ed.) Citation

Elkington, John, and Julia Hailes. The Green Consumer Guide. Ringwood, Victoria: Penguin Books, 1989.

MLA (9th ed.) Citation

Elkington, John, and Julia Hailes. The Green Consumer Guide. Penguin Books, 1989.