Dyfyniad APA

Christensen, T. H., Cossu, R., & Stegmann, R. (1999). Sardinia 99: Seventh international waste management and landfill symposium. CISA.

Dyfyniad Arddull Chicago

Christensen, Thomas H., Raffaello Cossu, and Rainer Stegmann. Sardinia 99: Seventh International Waste Management and Landfill Symposium. Cagliari: CISA, 1999.

Dyfyniad MLA

Christensen, Thomas H., et al. Sardinia 99: Seventh International Waste Management and Landfill Symposium. CISA, 1999.

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