Kristof, C. (1999). Biological Sciences. Directory of Electronic Journals, Newsletters, and Academic Discussion Lists. https://oaks.kent.edu/node/3290
Kristof, Cindy. 1999. “Biological Sciences”. Directory of Electronic Journals, Newsletters, and Academic Discussion Lists. https://oaks.kent.edu/node/3290.
Kristof, C. Biological Sciences. Directory of Electronic Journals, Newsletters, and Academic Discussion Lists, 1 Jan. 1999, https://oaks.kent.edu/node/3290.