Cita APA (7a ed.)
Wilson, P. J., & Wells, J. H. Coal, coke, and coal chemicals. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Wilson, Philip J., y Joseph H. Wells. Coal, Coke, and Coal Chemicals. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Wilson, Philip J., y Joseph H. Wells. Coal, Coke, and Coal Chemicals. McGraw-Hill.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.