University of the Philippines (Quezon City). Science Education Center & University of the Philippines (Diliman). Science Education Center. (1982). Ground water. SEC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines (Quezon City). Science Education Center و University of the Philippines (Diliman). Science Education Center. Ground Water. Quezon City: SEC, 1982.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines (Quezon City). Science Education Center و University of the Philippines (Diliman). Science Education Center. Ground Water. SEC, 1982.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.