Ferreras, S. A. (2005). The motivation and stress levels of female special education and regular elementary teachers among public schools in Angeles city and city of San Fernando, Pampanga. University of the Philippines Diliman Extension Program in Pampanga.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFerreras, Sheryl Ann. The Motivation and Stress Levels of Female Special Education and Regular Elementary Teachers Among Public Schools in Angeles City and City of San Fernando, Pampanga. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFerreras, Sheryl Ann. The Motivation and Stress Levels of Female Special Education and Regular Elementary Teachers Among Public Schools in Angeles City and City of San Fernando, Pampanga. University of the Philippines Diliman Extension Program in Pampanga, 2005.