APA

Martínez del Río E., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Managing marketing options for a state owned international oil trading company. : .

Chicago

Martínez del Río Eduardo, World Petroleum Congress (13th. : 1991 : Buenos Aires), .Managing marketing options for a state owned international oil trading company. : .

Harvard

Martínez del Río E., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Managing marketing options for a state owned international oil trading company. : .

MLA

Martínez del Río Eduardo, World Petroleum Congress (13th. : 1991 : Buenos Aires), .: . .