Cayabyab, C. S. (1994). The PNP officers senior executive course: An evaluation and its implications to national security.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cayabyab, Cesar S. The PNP Officers Senior Executive Course: An Evaluation and Its Implications to National Security. 1994.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cayabyab, Cesar S. The PNP Officers Senior Executive Course: An Evaluation and Its Implications to National Security. 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.