Galang, A. P., Reyes, D. P. T., Dela Cruz, E. L., Oliva, M. T. M., Pinpin, L., Mesina, S. R., & Wood, M. R. G. (2003). Seven lenses or environmental principles as if adult mattered. Bookmark.
Lua i Stíl Chicago (17ú heag.)Galang, Angelina P., Donna Paz T. Reyes, Editha L. Dela Cruz, Ma. Teresa M. Oliva, Lilibeth Pinpin, Sylvia R. Mesina, agus Ma. Rosario G. Wood. Seven Lenses or Environmental Principles as If Adult Mattered. Makati City: Bookmark, 2003.
Lua MLA (9ú heag.)Galang, Angelina P., et al. Seven Lenses or Environmental Principles as If Adult Mattered. Bookmark, 2003.
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