Dyfyniad APA

Watts, S., & Halliwell, L. (1996). Essential environmental science: Methods and techniques. Routledge.

Dyfyniad Arddull Chicago

Watts, Simon, and Lyndsay Halliwell. Essential Environmental Science: Methods and Techniques. New York: Routledge, 1996.

Dyfyniad MLA

Watts, Simon, and Lyndsay Halliwell. Essential Environmental Science: Methods and Techniques. Routledge, 1996.

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