APA
Dostal R. L., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Impact of environmental concerns on future chemical development. : .
Chicago
Dostal Robert L, World Petroleum Congress (13th. : 1991 : Buenos Aires), .Impact of environmental concerns on future chemical development. : .
Harvard
Dostal R. L., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Impact of environmental concerns on future chemical development. : .
MLA
Dostal Robert L, World Petroleum Congress (13th. : 1991 : Buenos Aires), .: . .