Williams, P. D. Filipino children's concepts of body organs and illnesses. NSTA-UPS Integrated Research Program, University of the Philippines.
Chicago Style aipamenaWilliams, Phoebe D. Filipino Children's Concepts of Body Organs and Illnesses. Diliamn, Quezon City: NSTA-UPS Integrated Research Program, University of the Philippines.
MLA aipamenaWilliams, Phoebe D. Filipino Children's Concepts of Body Organs and Illnesses. NSTA-UPS Integrated Research Program, University of the Philippines.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.