APA

Gieves C., King J., Goodheart L., Wilkinson J., Amoco, Shell, World Petroleum Congress (15th. : 1997 : Beijing), King J., Goodheart L., Wilkinson J., Amoco & Shell.Petroleum environmental research forum (PERF). : .

Chicago

Gieves C.G, King J.A, Goodheart L, Wilkinson J, Amoco, Shell, World Petroleum Congress (15th. : 1997 : Beijing), King J.A, Goodheart L, Wilkinson J, Amoco and Shell.Petroleum environmental research forum (PERF). : .

Harvard

Gieves C., King J., Goodheart L., Wilkinson J., Amoco, Shell, World Petroleum Congress (15th. : 1997 : Beijing), King J., Goodheart L., Wilkinson J., Amoco and Shell.Petroleum environmental research forum (PERF). : .

MLA

Gieves C.G, King J.A, Goodheart L, Wilkinson J, Amoco, Shell, World Petroleum Congress (15th. : 1997 : Beijing), King J.A, Goodheart L, Wilkinson J, Amoco and Shell.: . .