Shurter, R. (1964). Business research & report writing. Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)Shurter, R. Business Research & Report Writing. New York: Mc Graw Hill, 1964.
Lua MLA (9ú heag.)Shurter, R. Business Research & Report Writing. Mc Graw Hill, 1964.
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