APA

Posthuma S., Zuideveld P., Shell, World Petroleum Congress (15th. : 1997 : Beijing), Zuideveld P. & Shell.Gasification for synthesis gas and power generation. : .

Chicago

Posthuma S.A, Zuideveld P.L, Shell, World Petroleum Congress (15th. : 1997 : Beijing), Zuideveld P.L and Shell.Gasification for synthesis gas and power generation. : .

Harvard

Posthuma S., Zuideveld P., Shell, World Petroleum Congress (15th. : 1997 : Beijing), Zuideveld P. and Shell.Gasification for synthesis gas and power generation. : .

MLA

Posthuma S.A, Zuideveld P.L, Shell, World Petroleum Congress (15th. : 1997 : Beijing), Zuideveld P.L and Shell.: . .