International Correspondence Schools. (1906). Air-brake pumps: Triple valves and brake valves ; Air brake troubles ; Operating and testing trains ; Foundation brake gear ; Air-signal system ; High-speed brake. International Textbook Co..
Чикаго стиль цитування (17-те видання)International Correspondence Schools. Air-brake Pumps: Triple Valves and Brake Valves ; Air Brake Troubles ; Operating and Testing Trains ; Foundation Brake Gear ; Air-signal System ; High-speed Brake. Scranton: International Textbook Co., 1906.
Стиль цитування MLA (8-ме видання)International Correspondence Schools. Air-brake Pumps: Triple Valves and Brake Valves ; Air Brake Troubles ; Operating and Testing Trains ; Foundation Brake Gear ; Air-signal System ; High-speed Brake. International Textbook Co., 1906.