Markus, J., & Weston, C. (1988). Essential circuits reference guide. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Markus, John, agus Charles Weston. Essential Circuits Reference Guide. New York: McGraw-Hill, 1988.
Lua MLA (9ú heag.)Markus, John, agus Charles Weston. Essential Circuits Reference Guide. McGraw-Hill, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.