APA

Koliander W., Kunar-Schreferl G., World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary A. C. & Kunar-Schreferl G.The Metal Content of Crude Oils and Its Influence on Crude Oil Processing. : .

Chicago

Koliander W, Kunar-Schreferl G, World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary Alberta Canada) and Kunar-Schreferl G.The Metal Content of Crude Oils and Its Influence on Crude Oil Processing. : .

Harvard

Koliander W., Kunar-Schreferl G., World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary A. C. and Kunar-Schreferl G.The Metal Content of Crude Oils and Its Influence on Crude Oil Processing. : .

MLA

Koliander W, Kunar-Schreferl G, World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary Alberta Canada) and Kunar-Schreferl G.: . .