Copper, J. (1998). Visual basic programmer`s guide to java. Galgotia.
Lua i Stíl Chicago (17ú heag.)Copper, James. Visual Basic Programmer`s Guide to Java. New Delhi: Galgotia, 1998.
Lua MLA (9ú heag.)Copper, James. Visual Basic Programmer`s Guide to Java. Galgotia, 1998.
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