Clapp, J. (1974). Professional ethics and insignia. Scarecrow Press.
Lua i Stíl Chicago (17ú heag.)Clapp, Jane. Professional Ethics and Insignia. Metuchen, N.J: Scarecrow Press, 1974.
Lua MLA (9ú heag.)Clapp, Jane. Professional Ethics and Insignia. Scarecrow Press, 1974.
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