O'Neil, H. F. (1979). Procedures for instructional systems development. Academic Press.
Chicago-čujuhus (17. p.)O'Neil, Harold F. Procedures for Instructional Systems Development. Nueva York: Academic Press, 1979.
MLA-čujuhus (9. p.)O'Neil, Harold F. Procedures for Instructional Systems Development. Academic Press, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.