Dyfyniad APA

Makower, J., Elkington, J., & Hailes, J. (1991). The green consumer supermarket guide. Penguin Books.

Dyfyniad Arddull Chicago

Makower, Joel, John Elkington, and Julia Hailes. The Green Consumer Supermarket Guide. New York, N.Y., U.S.A.: Penguin Books, 1991.

Dyfyniad MLA

Makower, Joel, et al. The Green Consumer Supermarket Guide. Penguin Books, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.