Ross, P. (1983). Introducing LOGO: For the Apple II computer, Texas Instruments 99. Addison-Wesley Publishing Company.
Chicago-viite (17. p.)Ross, Peter. Introducing LOGO: For the Apple II Computer, Texas Instruments 99. Reading, Massachusetts: Addison-Wesley Publishing Company, 1983.
MLA-viite (9. p.)Ross, Peter. Introducing LOGO: For the Apple II Computer, Texas Instruments 99. Addison-Wesley Publishing Company, 1983.
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