Polentz, L. M. Engineering fundamentals for professional engineers examinations (3a ed.).
Lua i Stíl Chicago (17ú heag.)Polentz, Lloyd M. Engineering Fundamentals for Professional Engineers Examinations. 3a ed.
Lua MLA (8ú heag.)Polentz, Lloyd M. Engineering Fundamentals for Professional Engineers Examinations. 3a ed.
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