APA

Knoche H., Camarsa M., European Petroleum Industry Association, World Petroleum Congress (15th. : 1997 : Beijing), Camarsa M. & European Petroleum Industry Association.A fresh approach to clean air. : .

Chicago

Knoche Hubert, Camarsa Mario, European Petroleum Industry Association, World Petroleum Congress (15th. : 1997 : Beijing), Camarsa Mario and European Petroleum Industry Association.A fresh approach to clean air. : .

Harvard

Knoche H., Camarsa M., European Petroleum Industry Association, World Petroleum Congress (15th. : 1997 : Beijing), Camarsa M. and European Petroleum Industry Association.A fresh approach to clean air. : .

MLA

Knoche Hubert, Camarsa Mario, European Petroleum Industry Association, World Petroleum Congress (15th. : 1997 : Beijing), Camarsa Mario and European Petroleum Industry Association.: . .