Caldwell, I., & Thomason, D. (2006). A regra de quatro. Sic.
Chicago Style (17th ed.) CitationCaldwell, Ian, and Dustin Thomason. A Regra De Quatro. Sic, 2006.
MLA引文Caldwell, Ian, and Dustin Thomason. A Regra De Quatro. Sic, 2006.
警告：這些引文格式不一定是100％准確.