Makower, J., Elkington, J., & Hailes, J. (1991). The green consumer supermarket guide. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Makower, Joel, John Elkington, agus Julia Hailes. The Green Consumer Supermarket Guide. New York, N.Y., U.S.A.: Penguin Books, 1991.
Lua MLA (9ú heag.)Makower, Joel, et al. The Green Consumer Supermarket Guide. Penguin Books, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.