Clifford, M. How to read circuit diagrams and electronic graphs. Prentice-Hall.
Chicago-viite (17. p.)Clifford, Martin. How to Read Circuit Diagrams and Electronic Graphs. Englewood, N.J: Prentice-Hall.
MLA-viite (9. p.)Clifford, Martin. How to Read Circuit Diagrams and Electronic Graphs. Prentice-Hall.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.