Agustin, P. B. (1976). Teaching of science in Shamrock Elementary School and Northern Christian College, Laoag City, 1969-1970 [microform]. Photoduplication Service. University of the Philippines Library.
Cita Chicago (17th ed.)Agustin, Palmarine B. Teaching of Science in Shamrock Elementary School and Northern Christian College, Laoag City, 1969-1970 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1976.
Cita MLA (9th ed.)Agustin, Palmarine B. Teaching of Science in Shamrock Elementary School and Northern Christian College, Laoag City, 1969-1970 [microform]. Photoduplication Service. University of the Philippines Library, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.