Não informado. (2018). Professional Papers of the Signal Service. Chief Signal Officer.
Chicago-viite (17. p.)Não informado. Professional Papers of the Signal Service. Washington: Chief Signal Officer, 2018.
MLA-viite (8. p.)Não informado. Professional Papers of the Signal Service. Chief Signal Officer, 2018.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.