Cruz, B. V. (1965). Private secondary school principals in the city and province of Davao: A survey into their personal characteristics and their supervisory functions. College of Education, University of the Philippines Diliman.
Cita Chicago (17th ed.)Cruz, Benedicto Vizcarra. Private Secondary School Principals in the City and Province of Davao: A Survey into Their Personal Characteristics and Their Supervisory Functions. Quezon City, Philippines: College of Education, University of the Philippines Diliman, 1965.
Cita MLA (9th ed.)Cruz, Benedicto Vizcarra. Private Secondary School Principals in the City and Province of Davao: A Survey into Their Personal Characteristics and Their Supervisory Functions. College of Education, University of the Philippines Diliman, 1965.