Macht, M. W. (1986). Social word an introduction. Charles E. Merrill.
Lua i Stíl Chicago (17ú heag.)Macht, Mary Wirtz. Social Word an Introduction. Charles E. Merrill, 1986.
Lua MLA (9ú heag.)Macht, Mary Wirtz. Social Word an Introduction. Charles E. Merrill, 1986.
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