Dyfyniad APA

Ahmad, Y. J., Filho, A., & Khan, T. (1993). Communicating environmental risks. Earthscan.

Dyfyniad Arddull Chicago

Ahmad, Yusuf J., Alvaro Filho, and Tariq Khan. Communicating Environmental Risks. London: Earthscan, 1993.

Dyfyniad MLA

Ahmad, Yusuf J., et al. Communicating Environmental Risks. Earthscan, 1993.

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