University, S. L. (1922). Radio equipment, 1922. Saint Louis University Libraries Digitization Center.
Čikaški stil citiranja (17. izdanje)University, Saint Louis. Radio Equipment, 1922. Saint Louis University Libraries Digitization Center, 1922.
MLA način citiranja (8. izdanje)University, Saint Louis. Radio Equipment, 1922. Saint Louis University Libraries Digitization Center, 1922.
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