Bachman, Jerald G.; Segal, David R.; Freedman-Doan, Peter; O'Malley, Patrick M. (2000). "Who chooses military service? Correlates of propensity and enlistment in the U.S. Armed Forces". Military Psychology. 12 (1): 1–30. doi:10.1207/s15327876mp1201_1. S2CID143845150.
Asoni, Andrea; Gilli, Andrea; Gilli, Mauro; Sanandaji, Tino (30 January 2020). "A mercenary army of the poor? Technological change and the demographic composition of the post-9/11 U.S. military". Journal of Strategic Studies. 45 (4): 568–614. doi:10.1080/01402390.2019.1692660. ISSN0140-2390. S2CID213899510.
Faris, John H. (16 September 2016). "The Impact of Basic Combat Training: The Role of the Drill Sergeant in the All-Volunteer Army". Armed Forces & Society. 2 (1): 115–127. doi:10.1177/0095327x7500200108. S2CID145213941.
Bachman, Jerald G.; Segal, David R.; Freedman-Doan, Peter; O'Malley, Patrick M. (2000). "Who chooses military service? Correlates of propensity and enlistment in the U.S. Armed Forces". Military Psychology. 12 (1): 1–30. doi:10.1207/s15327876mp1201_1. S2CID143845150.
Asoni, Andrea; Gilli, Andrea; Gilli, Mauro; Sanandaji, Tino (30 January 2020). "A mercenary army of the poor? Technological change and the demographic composition of the post-9/11 U.S. military". Journal of Strategic Studies. 45 (4): 568–614. doi:10.1080/01402390.2019.1692660. ISSN0140-2390. S2CID213899510.
Faris, John H. (16 September 2016). "The Impact of Basic Combat Training: The Role of the Drill Sergeant in the All-Volunteer Army". Armed Forces & Society. 2 (1): 115–127. doi:10.1177/0095327x7500200108. S2CID145213941.
Asoni, Andrea; Gilli, Andrea; Gilli, Mauro; Sanandaji, Tino (30 January 2020). "A mercenary army of the poor? Technological change and the demographic composition of the post-9/11 U.S. military". Journal of Strategic Studies. 45 (4): 568–614. doi:10.1080/01402390.2019.1692660. ISSN0140-2390. S2CID213899510.
Grossman, Dave (2009). On killing : the psychological cost of learning to kill in war and society (Rev. ed.). New York: Little, Brown and Co. ISBN978-0-316-04093-8. OCLC427757599.