Shanghai and Guangzhou are the two most populated urban centers in the world

MLA

Joan Perez, and François Moriconi-Ebrard. Shanghai and Guangzhou Are the Two Most Populated Urban Centers in the World. Feb. 2017. 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=edsair&AN=edsair.doi.dedup.....3077c9677824e334198f1f74288b6ce7&authtype=sso&custid=ns315887.

APA

Joan Perez, & François Moriconi-Ebrard. (2017). Shanghai and Guangzhou are the two most populated urban centers in the world.

Chicago

Joan Perez, and François Moriconi-Ebrard. 2017. “Shanghai and Guangzhou Are the Two Most Populated Urban Centers in the World,” February. 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=edsair&AN=edsair.doi.dedup.....3077c9677824e334198f1f74288b6ce7&authtype=sso&custid=ns315887.