“Acknowledgements.” Medieval Military Technology, by Kelly DeVries, University of Toronto Press, 1992, pp. vii-viii, www.jstor.org/stable/10.3138/j.ctt2tv1qn.3. Accessed 26 Sept. 2020.
DeVries, K. (1992). Acknowledgements. In Medieval Military Technology (pp. Vii-Viii). University of Toronto Press. Retrieved September 26, 2020, from http://www.jstor.org/stable/10.3138/j.ctt2tv1qn.3
DeVries, Kelly. "Acknowledgements." In Medieval Military Technology, Vii-iii. University of Toronto Press, 1992. Accessed September 26, 2020. http://www.jstor.org/stable/10.3138/j.ctt2tv1qn.3.
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