Second sergeant (English Wikipedia)

"Capítulo V: Insignias militares". RGE 4-20.1: Reglamento de Uniformes, Insignias y Distinciones (in Spanish) (7th ed.). Colombia: National Army of Colombia. pp. 301–331. Retrieved 28 May 2021. {{cite book}}: |work= ignored (help)

eb.mil.br

"Postos e Graduações - Exército". eb.mil.br (in Portuguese). Brazilian Army. Retrieved 7 May 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.

"Insignias de Grados Militares". ejercito.mil.ni (in Spanish). Nicaraguan Armed Forces. Retrieved 29 May 2021.

"Jerarquías de la Tropa Profesional". ejercito.mil.ve. Government of Venezuela. 28 August 2017. Archived from the original on 17 July 2019.

"Postos do Exército". faa.ao (in Portuguese). Angolan Army. Retrieved 27 June 2021.

"Grados militares". minfar.gob.cu (in Spanish). Ministry of the Revolutionary Armed Forces (Cuba). Retrieved 28 May 2021.

"Patente". fa.gov.cv (in Portuguese). Cape Verdean Armed Forces. Archived from the original on 26 July 2022. Retrieved 26 May 2021.

Flores, Edmundo (1995). "National Security". In Merrill, Tim (ed.). Honduras: a country study. Area Handbook (3rd ed.). Washington, D.C.: Library of Congress. pp. 232–233. ISBN 978-0-8444-0836-1. LCCN 94043036. Retrieved 21 October 2021.
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. LCCN 89600299. Retrieved 5 October 2021.

Flores, Edmundo (1995). "National Security". In Merrill, Tim (ed.). Honduras: a country study. Area Handbook (3rd ed.). Washington, D.C.: Library of Congress. pp. 232–233. ISBN 978-0-8444-0836-1. LCCN 94043036. Retrieved 21 October 2021.
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. LCCN 89600299. Retrieved 5 October 2021.

"POSTOS E DISTINTIVOS EXÉRCITO". antigo.mdn.gov.pt (in Portuguese). Archived from the original on 1 March 2010. Retrieved 30 May 2021.

"SAF Rank Insignias". mindef.gov.sg. Ministry of Defence (Singapore). Retrieved 7 June 2021.

"Grados Militares". mindef.mil.gt (in Spanish). Ministry of Defence (Guatemala). Archived from the original on 16 May 2021. Retrieved 29 May 2021.

Secretary of National Defense (27 June 2019). "Manual gráfico para el uso de Uniformes, Divisas y Equipo del Ejército y F.A.M." [Graphic manual for the use of Uniforms, Badges and Equipment of the Army and Air Force] (PDF) (in Spanish). Retrieved 22 May 2021.

"Pangkat Harian". tni.mil.id (in Indonesian). Indonesian National Armed Forces. Archived from the original on 24 November 2020. Retrieved 4 June 2021.

"Patente". fa.gov.cv (in Portuguese). Cape Verdean Armed Forces. Archived from the original on 26 July 2022. Retrieved 26 May 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.
"Grados Militares". mindef.mil.gt (in Spanish). Ministry of Defence (Guatemala). Archived from the original on 16 May 2021. Retrieved 29 May 2021.
"Pangkat Harian". tni.mil.id (in Indonesian). Indonesian National Armed Forces. Archived from the original on 24 November 2020. Retrieved 4 June 2021.
"POSTOS E DISTINTIVOS EXÉRCITO". antigo.mdn.gov.pt (in Portuguese). Archived from the original on 1 March 2010. Retrieved 30 May 2021.
"Army ranks". Archived from the original on 29 October 2008.
"Jerarquías de la Tropa Profesional". ejercito.mil.ve. Government of Venezuela. 28 August 2017. Archived from the original on 17 July 2019.