Custodio-Gregorio, L. (1967). The reaction of selected teachers to the biology for Philippine High Schools: The Relationships of Living Things, an adaptation of the BSCS Green Version materials.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Custodio-Gregorio, Lucille. The Reaction of Selected Teachers to the Biology for Philippine High Schools: The Relationships of Living Things, an Adaptation of the BSCS Green Version Materials. Quezon City, 1967.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Custodio-Gregorio, Lucille. The Reaction of Selected Teachers to the Biology for Philippine High Schools: The Relationships of Living Things, an Adaptation of the BSCS Green Version Materials. 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.