Origin of the Punnett Square.

MLA

Davis, Lawrence C. “Origin of the Punnett Square.” American Biology Teacher, vol. 55, no. 4, Jan. 1993, pp. 209–12. EBSCOhost, widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=eric&AN=EJ471522&authtype=sso&custid=ns315887.

APA

Davis, L. C. (1993). Origin of the Punnett Square. American Biology Teacher, 55(4), 209–212.

Chicago

Davis, Lawrence C. 1993. “Origin of the Punnett Square.” American Biology Teacher 55 (4): 209–12. http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=eric&AN=EJ471522&authtype=sso&custid=ns315887.