University of the Philippines National Institute for Science and Mathematics Education Development & Department of Science and Technology-Science Education Institute. Exploring the area of a trapezoid [computer file]. UP NISMED.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines National Institute for Science and Mathematics Education Development و Department of Science and Technology-Science Education Institute. Exploring the Area of a Trapezoid [computer File]. Quezon City: UP NISMED.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines National Institute for Science and Mathematics Education Development و Department of Science and Technology-Science Education Institute. Exploring the Area of a Trapezoid [computer File]. UP NISMED.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.