APA

Simpson B. J., Concawe & Simpson B. J. (1994). An occupational physician's introduction to health hazards associated with working in a petroleum refinery. Brussels: Concawe.

Chicago

Simpson B J, Concawe and Simpson B J. 1994. An occupational physician's introduction to health hazards associated with working in a petroleum refinery. Brussels: Concawe.

Harvard

Simpson B. J., Concawe and Simpson B. J. (1994). An occupational physician's introduction to health hazards associated with working in a petroleum refinery. Brussels: Concawe.

MLA

Simpson B J, Concawe and Simpson B J. An occupational physician's introduction to health hazards associated with working in a petroleum refinery. Brussels: Concawe. 1994.