Cite
Chymosin for Classroom Experiments: An Introduction to the Nature and Action of Enzymes.
MLA
Harewood, Ken, and Richard Hinman. “Chymosin for Classroom Experiments: An Introduction to the Nature and Action of Enzymes.” American Biology Teacher, vol. 61, no. 4, Jan. 1999, pp. 288–93. 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=EJ590255&authtype=sso&custid=ns315887.
APA
Harewood, K., & Hinman, R. (1999). Chymosin for Classroom Experiments: An Introduction to the Nature and Action of Enzymes. American Biology Teacher, 61(4), 288–293.
Chicago
Harewood, Ken, and Richard Hinman. 1999. “Chymosin for Classroom Experiments: An Introduction to the Nature and Action of Enzymes.” American Biology Teacher 61 (4): 288–93. 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=EJ590255&authtype=sso&custid=ns315887.