APA

Dight L., Petroleum Catalyst Group, World Petroleum Congress (15th. : 1997 : Beijing) & Petroleum Catalyst Group.Unit and catalyst technologies for dealing with residuum feedstocks in Asia/Pacific. : .

Chicago

Dight L.B, Petroleum Catalyst Group, World Petroleum Congress (15th. : 1997 : Beijing) and Petroleum Catalyst Group.Unit and catalyst technologies for dealing with residuum feedstocks in Asia/Pacific. : .

Harvard

Dight L., Petroleum Catalyst Group, World Petroleum Congress (15th. : 1997 : Beijing) and Petroleum Catalyst Group.Unit and catalyst technologies for dealing with residuum feedstocks in Asia/Pacific. : .

MLA

Dight L.B, Petroleum Catalyst Group, World Petroleum Congress (15th. : 1997 : Beijing) and Petroleum Catalyst Group.: . .