Ultra-low sulphur (ULS)

MLA

“Ultra-Low Sulphur (ULS).” Petroleum Economist, vol. 68, no. 4, Apr. 2001, p. 57. 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=edsggo&AN=edsgcl.74828543&authtype=sso&custid=ns315887.

APA

Ultra-low sulphur (ULS). (2001, April 1). Petroleum Economist, 68(4), 57.

Chicago

Petroleum Economist. 2001. “Ultra-Low Sulphur (ULS),” April 1. 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=edsggo&AN=edsgcl.74828543&authtype=sso&custid=ns315887.