Harris, F. E. (1963). Numbers and units for science. Addison-Wesley Pub.
Cita Chicago (17th ed.)Harris, Frank E. Numbers and Units for Science. Reading, Mass: Addison-Wesley Pub, 1963.
Cita MLA (9th ed.)Harris, Frank E. Numbers and Units for Science. Addison-Wesley Pub, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.