McQuigg, J. D., & Harness, A. M. (1970). Flowcharting. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)McQuigg, James D., agus Alta M. Harness. Flowcharting. Boston: Houghton Mifflin, 1970.
Lua MLA (8ú heag.)McQuigg, James D., agus Alta M. Harness. Flowcharting. Houghton Mifflin, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.