Hughes, Joan K.
PL/ I structured programming
John Wiley & Sons, 1979
 Buku Teks
Hume, J.N.P.
Structured programming using PL/1 and SP/K
Prentice-Hall, 1975
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Conway, Richard
An introduction to programming: a structured approach using PL/1 and PL/C-7
Massachusetts Winthrop Publishers, 1975
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Scheid, Francis
Theory and problems of computers and programming
McGraw-Hill, 1983
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Barnes, J.G.P. (John Gilbert Presslie)
Programming in Ada
Addison-Wesley, 1981
 Buku Teks