Geddes, L. Retrospectroscope: Horatio B. Williams and the first electrocardiographs made in the United States. IEEE Engineering in medicine and biology magazine.
Chicago Style (17th ed.) CitationGeddes, L.A. "Retrospectroscope: Horatio B. Williams and the First Electrocardiographs Made in the United States." IEEE Engineering in Medicine and Biology Magazine .
MLA (9th ed.) CitationGeddes, L.A. "Retrospectroscope: Horatio B. Williams and the First Electrocardiographs Made in the United States." IEEE Engineering in Medicine and Biology Magazine, .
Warning: These citations may not always be 100% accurate.