Não informado. (2018). Professional Papers of the Signal Service. Chief Signal Officer.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Professional Papers of the Signal Service. Washington: Chief Signal Officer, 2018.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Professional Papers of the Signal Service. Chief Signal Officer, 2018.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.