Ryan, J. A. (1928). International Ethics: A report of the ethics committee. Washington, D.C..
Lua i Stíl Chicago (17ú heag.)Ryan, John A. International Ethics: A Report of the Ethics Committee. Washington, D.C., 1928.
Lua MLA (8ú heag.)Ryan, John A. International Ethics: A Report of the Ethics Committee. Washington, D.C., 1928.
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