APA (7e ed.) Bronvermelding

Wallis, R. (2003). How safe are our skies?: Assessing the airlines' response to terrorism. Praeger.

Chicago (17e ed.) Bronvermelding

Wallis, Rodney. How Safe Are Our Skies?: Assessing the Airlines' Response to Terrorism. Westport, Conn.: Praeger, 2003.

MLA (9e ed.) Bronvermelding

Wallis, Rodney. How Safe Are Our Skies?: Assessing the Airlines' Response to Terrorism. Praeger, 2003.