APA Edition Citation

Armstrong, L. (1971). Theory of the hyperfine structure of free atoms.

Chicago Edition Citation

Armstrong, Lloyd. Theory of the Hyperfine Structure of Free Atoms. New York, Wiley Interscience, 1971.

MLA Edition Citation

Armstrong, Lloyd. Theory of the Hyperfine Structure of Free Atoms. 1971.

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