Edgar, G. A., Ullman, D. H., West, D. B., Bracken, P., Brown, E. A., Franco, Z., … Zhang, F. (2017). Problems and solutions. American Mathematical Monthly, 124(8), 754–762. https://doi.org/10.4169/amer.math.monthly.124.8.754

Edgar, G. A., D. H. Ullman, D. B. West, P. Bracken, E. A. Brown, Z. Franco, C. Friesen, et al. “Problems and solutions.” American Mathematical Monthly 124, no. 8 (October 1, 2017): 754–62. https://doi.org/10.4169/amer.math.monthly.124.8.754.

Edgar GA, Ullman DH, West DB, Bracken P, Brown EA, Franco Z, et al. Problems and solutions. American Mathematical Monthly. 2017 Oct 1;124(8):754–62.

Edgar, G. A., et al. “Problems and solutions.” American Mathematical Monthly, vol. 124, no. 8, Oct. 2017, pp. 754–62. Scopus, doi:10.4169/amer.math.monthly.124.8.754.

Edgar GA, Ullman DH, West DB, Bracken P, Brown EA, Franco Z, Friesen C, Lipták L, Luttmann R, Miles FB, Ng L, Smiley L, Stolarsky K, Stong R, Stromquist W, Velleman D, Wilmer E, Zeitz P, Zhang F. Problems and solutions. American Mathematical Monthly. 2017 Oct 1;124(8):754–762.