SPIEGEL MURRY R. (1974). SCHAUMS VECTOR ANALYSIS. MCGRAW HILL.
Lua i Stíl Chicago (17ú heag.)SPIEGEL MURRY R. SCHAUMS VECTOR ANALYSIS. NEW-YORK: MCGRAW HILL, 1974.
Lua MLA (9ú heag.)SPIEGEL MURRY R. SCHAUMS VECTOR ANALYSIS. MCGRAW HILL, 1974.
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