Ryser, Herbert J. “PREFACE.” Combinatorial Mathematics, by HERBERT JOHN RYSER, 1st ed., vol. 14, Mathematical Association of America, 1963, pp. ix-x. JSTOR, www.jstor.org/stable/10.4169/j.ctt5hh8v6.2. Accessed 15 June 2021.
Ryser, H. (1963). PREFACE. In RYSER H. (Author), Combinatorial Mathematics (pp. Ix-X). Mathematical Association of America. Retrieved June 15, 2021, from http://www.jstor.org/stable/10.4169/j.ctt5hh8v6.2
Ryser, Herbert J. "PREFACE." In Combinatorial Mathematics, by RYSER HERBERT JOHN, Ix-X. Mathematical Association of America, 1963. Accessed June 15, 2021. http://www.jstor.org/stable/10.4169/j.ctt5hh8v6.2.
Export a RIS file (For EndNote, ProCite, Reference Manager, Zotero, Mendeley…)
Export a Text file (For BibTex)
Note: Always review your references and make any necessary corrections before using. Pay attention to names, capitalization, and dates.