Betts, J. E. (1989). Essentials of applied physics. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Betts, John E. Essentials of Applied Physics. Englewood Cliffs, NJ: Prentice Hall, 1989.
Lua MLA (9ú heag.)Betts, John E. Essentials of Applied Physics. Prentice Hall, 1989.
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