APA

Gerard R. D., Shell, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) & Shell.Engineering construction and start-up considerations in the development of a Middle East petrochemical complex. : .

Chicago

Gerard Roy D, Shell, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Shell.Engineering construction and start-up considerations in the development of a Middle East petrochemical complex. : .

Harvard

Gerard R. D., Shell, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Shell.Engineering construction and start-up considerations in the development of a Middle East petrochemical complex. : .

MLA

Gerard Roy D, Shell, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston) and Shell.: . .