Bound paperback books
APL\360 Reference Manual Second Edition. Sandra Pakin. 1972.
APLUM Reference Manual. Second Edition. Clark Wiedmann. 1975
Collected Whizbangs. Scientific Time Sharing Corporation. Roy A. Sykes, Jr.. 1978
APL An Interactive Approach. Second Edition. Leonard Gilman and Allen J. Rose. 1976
Stapled photocopied Books
The APL Idiom List. Yale University. Department of Computer Science research Report #87. Alan J. Perlis and Spencer Rugaber.
Introduction to APL. University of Massachusetts at Amherst. University Computing Center. Clark Wiedmann. Septermber 1972.
APL Primer. Reprinted from APL\360 Primer. February 1970
APLUM Reference Manual. APL 2.0. University of Massachusetts at Amherst. University Computing Center.
Papers
APL in an Industrial Environment. Presented at AIChE Meeting, Miami, FL 1978-11-16. Fred J. Krambeck.
APL and Programming Productivity in Modeling Calculations, Data Acquisition and Data Procession. Chemical Engineering Department. Case Western Reserve University. Cleveland, OH. J. Adin Man, Jr.