Snider, J. G., & Osgood, C. E. (1969). Semantic differential technique: A sourcebook. Aldine.
Lua i Stíl Chicago (17ú heag.)Snider, James G., agus Charles Egerton Osgood. Semantic Differential Technique: A Sourcebook. Chicago: Aldine, 1969.
Lua MLA (9ú heag.)Snider, James G., agus Charles Egerton Osgood. Semantic Differential Technique: A Sourcebook. Aldine, 1969.
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