APA (7th ed.) Citation
Meeting of the Conference of the Contracting Parties to the Convention on Wetlands (Ramsar) (4th : 1990 : Montreux, Switzerland), & Ramsar Convention Bureau. Convention on wetlands of international importance especially as waterfowl habitat, Montreux, Switzerland 27 June to July 1990: Proceedings of the Fourth Meeting of the Conference of the Contracting Parties.
Chicago Style (17th ed.) Citation
Meeting of the Conference of the Contracting Parties to the Convention on Wetlands (Ramsar) (4th : 1990 : Montreux, Switzerland), and Ramsar Convention Bureau. Convention on Wetlands of International Importance Especially as Waterfowl Habitat, Montreux, Switzerland 27 June to July 1990: Proceedings of the Fourth Meeting of the Conference of the Contracting Parties.
MLA (9th ed.) Citation
Meeting of the Conference of the Contracting Parties to the Convention on Wetlands (Ramsar) (4th : 1990 : Montreux, Switzerland), and Ramsar Convention Bureau. Convention on Wetlands of International Importance Especially as Waterfowl Habitat, Montreux, Switzerland 27 June to July 1990: Proceedings of the Fourth Meeting of the Conference of the Contracting Parties.
Warning: These citations may not always be 100% accurate.