Van Nostrand, A. (1978). Functional writing. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Van Nostrand, A.D. Functional Writing. Boston: Houghton Mifflin, 1978.
Lua MLA (9ú heag.)Van Nostrand, A.D. Functional Writing. Houghton Mifflin, 1978.
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