Elkington, J., Hailes, J., & Makower, J. (1990). The green consumer. Penguin Books.
芝加哥风格引文Elkington, John, Julia Hailes, 与 Joel Makower. The Green Consumer. New York, N.Y., U.S.A.: Penguin Books, 1990.
MLA引文Elkington, John, et al. The Green Consumer. Penguin Books, 1990.
警告：这些引文格式不一定是100％准确.