Dyfyniad APA

Hahn, J., & Hahn, L. (1973). Recycling: Reusing our world's solid wastes. Franklin Watts.

Dyfyniad Arddull Chicago

Hahn, James, and Lynn Hahn. Recycling: Reusing Our World's Solid Wastes. New York: Franklin Watts, 1973.

Dyfyniad MLA

Hahn, James, and Lynn Hahn. Recycling: Reusing Our World's Solid Wastes. Franklin Watts, 1973.

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