David, R. S. (2016). Understanding the 4Ps. Philippine Daily Inquirer.
Chicago Style (17th ed.) CitationDavid, Randolf S. "Understanding the 4Ps." Philippine Daily Inquirer 2016.
MLA引文David, Randolf S. "Understanding the 4Ps." Philippine Daily Inquirer, 2016.
警告:這些引文格式不一定是100%准確.