APA
Roythorne C., Concawe & Roythorne C. (1991). The role of epidemiology in the health assessment of petroleum industry employees. Brussels: Concawe.
Chicago
Roythorne C, Concawe and Roythorne C. 1991. The role of epidemiology in the health assessment of petroleum industry employees. Brussels: Concawe.
Harvard
Roythorne C., Concawe and Roythorne C. (1991). The role of epidemiology in the health assessment of petroleum industry employees. Brussels: Concawe.
MLA
Roythorne C, Concawe and Roythorne C. The role of epidemiology in the health assessment of petroleum industry employees. Brussels: Concawe. 1991.