APA

Halbert T., Anderson G., Markley G., Exxon, World Petroleum Congress (15th. : 1997 : Beijing), Anderson G., Markley G. & Exxon.Meeting the challenges of deep diesel desulfurization. : .

Chicago

Halbert Thomas, Anderson George, Markley Gerald, Exxon, World Petroleum Congress (15th. : 1997 : Beijing), Anderson George, Markley Gerald and Exxon.Meeting the challenges of deep diesel desulfurization. : .

Harvard

Halbert T., Anderson G., Markley G., Exxon, World Petroleum Congress (15th. : 1997 : Beijing), Anderson G., Markley G. and Exxon.Meeting the challenges of deep diesel desulfurization. : .

MLA

Halbert Thomas, Anderson George, Markley Gerald, Exxon, World Petroleum Congress (15th. : 1997 : Beijing), Anderson George, Markley Gerald and Exxon.: . .