توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Castillo, L. L. (1993). Notes in mathematics for general education: A cooperative venture of the U.P. Diliman GE Mathematics Committee. University of the Philippines, GE Committee.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Castillo, Leticia L. Notes in Mathematics for General Education: A Cooperative Venture of the U.P. Diliman GE Mathematics Committee. Quezon City: University of the Philippines, GE Committee, 1993.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Castillo, Leticia L. Notes in Mathematics for General Education: A Cooperative Venture of the U.P. Diliman GE Mathematics Committee. University of the Philippines, GE Committee, 1993.