Harms, Edward
Introduction APL and computer programming
John Wiley & Sons, 1977
 Buku Teks SO
Katzan, Harry, Jr.
The IBM 5100 Portable computer: A comprehensive guide for users and programmers
Van Nostrand Reinhold, 1977
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Wiedmann, Clark
Handbook of APL Programming
Petrocelli Books, 1974
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LePage, Wilbur R.
Applied APL programming
Prentice-Hall, 1978
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APL in practice : what you need to know to install and use successful APL systems and Major applications
John Wiley & Sons, 1980
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