Spencer, D. D. (1985). Learning BASIC for microcomputers: A worktext for Apple, II, Iic and Iie. Charles E. Merrill Publishing.
Lua i Stíl Chicago (17ú heag.)Spencer, Donald D. Learning BASIC for Microcomputers: A Worktext for Apple, II, Iic and Iie. Columbus: Charles E. Merrill Publishing, 1985.
Lua MLA (9ú heag.)Spencer, Donald D. Learning BASIC for Microcomputers: A Worktext for Apple, II, Iic and Iie. Charles E. Merrill Publishing, 1985.
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