University of the Philippines Diliman. Law Center. Division of Continuing Legal Education & Gumtang, W. G. (1975). Recent developments in law and jurisprudence: A selection of lectures given at various general law practice institutes. U.P. Law Center.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines Diliman. Law Center. Division of Continuing Legal Education و William G. Gumtang. Recent Developments in Law and Jurisprudence: A Selection of Lectures Given at Various General Law Practice Institutes. Quezon City: U.P. Law Center, 1975.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines Diliman. Law Center. Division of Continuing Legal Education و William G. Gumtang. Recent Developments in Law and Jurisprudence: A Selection of Lectures Given at Various General Law Practice Institutes. U.P. Law Center, 1975.