Conway, Richard
An Introduction to programming: a structured approach using PL/I and PL/C
Winthrop Publishers, 1973
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Hughes, Joan K.
PL/ I structured programming
John Wiley & Sons, 1979
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Hughes, Joan K.
Structured programming using PL/C
John Wiley & Sons, 1981
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Weinberg, Gerald
Structured programming in PL/C : an abecedarian
John Wiley & Sons, 1973
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Katzan, Harry, Jr.
A PL/I approach to programming languages
Auerbach, 1972
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