Cite
Calymene variolaris Brongniart, 1822 (Trilobita): proposed use of the Plenary Powers to designate a neotype in harmony with current use. Z.N.(S.) 2189
MLA
Tripp, R. P., et al. Calymene Variolaris Brongniart, 1822 (Trilobita): Proposed Use of the Plenary Powers to Designate a Neotype in Harmony with Current Use. Z.N.(S.) 2189. Jan. 1977, pp. 250–52. 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=edsbhl&AN=edsbhl.part.76138&authtype=sso&custid=ns315887.
APA
Tripp, R. P., Temple, J. T., & Gass, K. C. (1977). Calymene variolaris Brongniart, 1822 (Trilobita): proposed use of the Plenary Powers to designate a neotype in harmony with current use. Z.N.(S.) 2189. 33, 250–252.
Chicago
Tripp, R P, J T Temple, and K C Gass. 1977. “Calymene Variolaris Brongniart, 1822 (Trilobita): Proposed Use of the Plenary Powers to Designate a Neotype in Harmony with Current Use. Z.N.(S.) 2189,” Bulletin of Zoological Nomenclature, 33, 33 (January): 250–52. 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=edsbhl&AN=edsbhl.part.76138&authtype=sso&custid=ns315887.