Philippines. National Science Technology Authority. Science Promotion Institute & University of the Philippines Institute for Science and Mathematics Education Development. (1986). Improvised science equipment for secondary science: Technical Working Committee ; Ester B. Ogena ; edited and illustrated by University of the Philippines Institute for Science and Mathematics Education Development. The Institute.
Chicago-referens (17:e uppl.)Philippines. National Science Technology Authority. Science Promotion Institute och University of the Philippines Institute for Science and Mathematics Education Development. Improvised Science Equipment for Secondary Science: Technical Working Committee ; Ester B. Ogena ; Edited and Illustrated by University of the Philippines Institute for Science and Mathematics Education Development. Taguig, MM: The Institute, 1986.
MLA-referens (9:e uppl.)Philippines. National Science Technology Authority. Science Promotion Institute och University of the Philippines Institute for Science and Mathematics Education Development. Improvised Science Equipment for Secondary Science: Technical Working Committee ; Ester B. Ogena ; Edited and Illustrated by University of the Philippines Institute for Science and Mathematics Education Development. The Institute, 1986.