Gaya APA

Lewis, J, A., Witkowsky, A. (2004). Transformasing Air Traffic Management Beyond Evolution . Washington D.C: the center for strategic and internatioal studies.

Gaya MLA

Lewis, James, A.., Witkowsky, Anne. "Transformasing Air Traffic Management Beyond Evolution". Washington D.C: the center for strategic and internatioal studies, 2004. Text.