Lua APA (7ú heag.)
ebrary, Inc, & Riley, S. G. (1995). Biographical dictionary of American newspaper columnists. Greenwood Press.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Sam G. Riley. Biographical Dictionary of American Newspaper Columnists. Westport, Conn.: Greenwood Press, 1995.
Lua MLA (9ú heag.)
ebrary, Inc, agus Sam G. Riley. Biographical Dictionary of American Newspaper Columnists. Greenwood Press, 1995.
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