APA

Johnson S., Steen A., Bansal K., Phillips, World Petroleum Congress (15th. : 1997 : Beijing), Steen A., Bansal K. & Phillips.An overview of oil and grease determination in produced water. : .

Chicago

Johnson S.J, Steen A.E, Bansal K.M, Phillips, World Petroleum Congress (15th. : 1997 : Beijing), Steen A.E, Bansal K.M and Phillips.An overview of oil and grease determination in produced water. : .

Harvard

Johnson S., Steen A., Bansal K., Phillips, World Petroleum Congress (15th. : 1997 : Beijing), Steen A., Bansal K. and Phillips.An overview of oil and grease determination in produced water. : .

MLA

Johnson S.J, Steen A.E, Bansal K.M, Phillips, World Petroleum Congress (15th. : 1997 : Beijing), Steen A.E, Bansal K.M and Phillips.: . .