Steffen, H., Splieth, C., & Behr, K. (1999). Comparison of measurements obtained with hand files or the Canal Leader attached to electronic apex locators: An in vitro study. International Endodontic Journal, 32(2), 103. https://doi.org/10.1046/j.1365-2591.1999.00198.x
Chicago Style (17th ed.) CitationSteffen, H., CH Splieth, and K. Behr. "Comparison of Measurements Obtained with Hand Files or the Canal Leader Attached to Electronic Apex Locators: An in Vitro Study." International Endodontic Journal 32, no. 2 (1999): 103. https://doi.org/10.1046/j.1365-2591.1999.00198.x.
MLA (9th ed.) CitationSteffen, H., et al. "Comparison of Measurements Obtained with Hand Files or the Canal Leader Attached to Electronic Apex Locators: An in Vitro Study." International Endodontic Journal, vol. 32, no. 2, 1999, p. 103, https://doi.org/10.1046/j.1365-2591.1999.00198.x.