3BM Television (Firm), WGBH Educational Foundation, & Nicholson, P. (2003). Who killed the Red Baron: A new look at who may have taken the Red Baron down. WGBH Educational Foundation.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)3BM Television (Firm), WGBH Educational Foundation, và Peter Nicholson. Who Killed the Red Baron: A New Look at Who May Have Taken the Red Baron Down. [United States]: WGBH Educational Foundation, 2003.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)3BM Television (Firm), et al. Who Killed the Red Baron: A New Look at Who May Have Taken the Red Baron Down. WGBH Educational Foundation, 2003.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.