APA Citation

Mechtly, E. A. (1973). The international system of units: Physical constants and conversion factors (2nd revision.). Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration.

Chicago Style Citation

Mechtly, E. A. The International System of Units: Physical Constants and Conversion Factors. 2nd revision. Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration, 1973.

MLA Citation

Mechtly, E. A. The International System of Units: Physical Constants and Conversion Factors. 2nd revision. Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration, 1973.

Warning: These citations may not always be 100% accurate.