Ehrenreich, Frederich (1985). "National Security". In Nelson, Harold D. (ed.). Morocco: a country study. Area Handbook (5th ed.). Washington, D.C.: American University. pp. 350–351. LCCN85600265. Retrieved 16 September 2023.
"Distintivos de grados" [Badges of degrees]. ejercito.cl (in Spanish). Chilean Army. Archived from the original on 20 January 2012. Retrieved 20 January 2012.
Ehrenreich, Frederich (1985). "National Security". In Nelson, Harold D. (ed.). Morocco: a country study. Area Handbook (5th ed.). Washington, D.C.: American University. pp. 350–351. LCCN85600265. Retrieved 16 September 2023.
Cooke, Melinda W. (1990). "Chapter 5: National Security". In Hanratty, Dennis M.; Meditz, Sandra W. (eds.). Paraguay: A Country Study. Area Handbook Series (2nd ed.). Library of Congress. pp. 216–217. LCCN89600299. Retrieved 5 October 2021.
loc.gov
Cooke, Melinda W. (1990). "Chapter 5: National Security". In Hanratty, Dennis M.; Meditz, Sandra W. (eds.). Paraguay: A Country Study. Area Handbook Series (2nd ed.). Library of Congress. pp. 216–217. LCCN89600299. Retrieved 5 October 2021.
"Distintivos de grados" [Badges of degrees]. ejercito.cl (in Spanish). Chilean Army. Archived from the original on 20 January 2012. Retrieved 20 January 2012.