Johnson, E. L., & Karim, M. A. (1987). Digital design: A pragmatic approach. PWS Engineering.
Chicago-čujuhus (17. p.)Johnson, Everett L., juo Mohammad A. Karim. Digital Design: A Pragmatic Approach. Boston: PWS Engineering, 1987.
MLA-čujuhus (9. p.)Johnson, Everett L., juo Mohammad A. Karim. Digital Design: A Pragmatic Approach. PWS Engineering, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.