The riddle of man's ancestry.

MLA

Straus, W. L., Jr. “The Riddle of Man’s Ancestry.” The Quarterly Review of Biology, vol. 24, no. 3, Sept. 1949, pp. 200–23. EBSCOhost, https://doi.org/10.1086/397067.

APA

Straus, W. L., Jr. (1949). The riddle of man’s ancestry. The Quarterly Review of Biology, 24(3), 200–223. https://doi.org/10.1086/397067

Chicago

Straus, W L, Jr. 1949. “The Riddle of Man’s Ancestry.” The Quarterly Review of Biology 24 (3): 200–223. doi:10.1086/397067.