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.

Galang, Angelina P., Donna Paz T. Reyes, Editha L. Dela Cruz, Ma. Teresa M. Oliva, Lilibeth Pinpin, Sylvia R. Mesina, and Ma. Rosario G. Wood. Seven Lenses or Environmental Principles as If Adult Mattered. Makati City: Bookmark, 2003.

Galang, Angelina P., et al. Seven Lenses or Environmental Principles as If Adult Mattered. Bookmark, 2003.