Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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