Sotto, R. J. B. (2008). A test development research: Sotto-Tolentino global assessment of functioning questionnaire. University of the Philippines Diliman Extension Program in Pampanga.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sotto, Romeulus John B. A Test Development Research: Sotto-Tolentino Global Assessment of Functioning Questionnaire. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Sotto, Romeulus John B. A Test Development Research: Sotto-Tolentino Global Assessment of Functioning Questionnaire. University of the Philippines Diliman Extension Program in Pampanga, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.