Cita APA (7th ed.)
ebrary, Inc, & Bullock, J. A. (2006). Introduction to homeland security (2nd ed.). Butterworth-Heinemann.
Cita Chicago (17th ed.)
ebrary, Inc, i Jane A. Bullock. Introduction to Homeland Security. 2nd ed. Amsterdam ; Boston: Butterworth-Heinemann, 2006.
Cita MLA (9th ed.)
ebrary, Inc, i Jane A. Bullock. Introduction to Homeland Security. 2nd ed. Butterworth-Heinemann, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.