Ortigas, C. D. (1997). Group process and the industries methods: Theory and practices in the Philippines (3rd ed.). Ateneo de Manila University Press.
Chicago-Zitierstil (17. Ausg.)Ortigas, Carmela D. Group Process and the Industries Methods: Theory and Practices in the Philippines. 3rd ed. Quezon City: Ateneo de Manila University Press, 1997.
MLA-Zitierstil (9. Ausg.)Ortigas, Carmela D. Group Process and the Industries Methods: Theory and Practices in the Philippines. 3rd ed. Ateneo de Manila University Press, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.