Merkel, J. A. (1974). Basic engineering principles. AVI Pub.
Lua i Stíl Chicago (17ú heag.)Merkel, James A. Basic Engineering Principles. Westport, Conn: AVI Pub, 1974.
Lua MLA (9ú heag.)Merkel, James A. Basic Engineering Principles. AVI Pub, 1974.
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