Não informado. (2018). Professional Papers of the Signal Service. Chief Signal Officer.
Citação do estilo Chicago (17ª ed.)Não informado. Professional Papers of the Signal Service. Washington: Chief Signal Officer, 2018.
Citação MLA (8ª ed.)Não informado. Professional Papers of the Signal Service. Chief Signal Officer, 2018.
Atenció: Aquestes cites poden no estar 100% correctes.