APA

Smith R. W., Syncrude (Canadá), World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) & Syncrude (Canadá).Progress in surface mining production from Canadaś oil sands. : .

Chicago

Smith Robert W, Syncrude (Canadá), World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Syncrude (Canadá).Progress in surface mining production from Canadaś oil sands. : .

Harvard

Smith R. W., Syncrude (Canadá), World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Syncrude (Canadá).Progress in surface mining production from Canadaś oil sands. : .

MLA

Smith Robert W, Syncrude (Canadá), World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Syncrude (Canadá).: . .