Jr, F. C., PG, H., & HD, L. (1961). The vectorcardiogram in normal young adults. Frank lead system. American heart journal, 62, 237. https://doi.org/10.1016/0002-8703(61)90323-4
Chicago Style (17th ed.) CitationJr, FORKNER CE, HUGENHOLTZ PG, and LEVINE HD. "The Vectorcardiogram in Normal Young Adults. Frank Lead System." American Heart Journal 62 (1961): 237. https://doi.org/10.1016/0002-8703(61)90323-4.
MLA (9th ed.) CitationJr, FORKNER CE, et al. "The Vectorcardiogram in Normal Young Adults. Frank Lead System." American Heart Journal, vol. 62, 1961, p. 237, https://doi.org/10.1016/0002-8703(61)90323-4.
Warning: These citations may not always be 100% accurate.