Heller, P. (2001). Java 2 exam notes. Sybex.
Lua i Stíl Chicago (17ú heag.)Heller, Philip. Java 2 Exam Notes. San Francisco, CA: Sybex, 2001.
Lua MLA (8ú heag.)Heller, Philip. Java 2 Exam Notes. Sybex, 2001.
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