Dyfyniad APA

Marco, J. G., & Worth Holling, M. R. D. (1987). Silent Spring Revisited. American Chemical Society.

Dyfyniad Arddull Chicago

Marco, J Gino, and M Robert Durham Worth Holling. Silent Spring Revisited. Washington: American Chemical Society, 1987.

Dyfyniad MLA

Marco, J Gino, and M Robert Durham Worth Holling. Silent Spring Revisited. American Chemical Society, 1987.

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