The rule of twenty-thirds.

MLA

Pitches, Adrian. “The Rule of Twenty-Thirds.” British Birds, vol. 110, no. 6, June 2017, pp. 365–66. 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=edo&AN=123468254&authtype=sso&custid=ns315887.

APA

Pitches, A. (2017). The rule of twenty-thirds. British Birds, 110(6), 365–366.

Chicago

Pitches, Adrian. 2017. “The Rule of Twenty-Thirds.” British Birds 110 (6): 365–66. 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=edo&AN=123468254&authtype=sso&custid=ns315887.