Erven, E. v. (1989). Stages of people power: The Philippines Educational Theater Association. Center for the Study of Education in Developing Countries.
Chicago-referens (17:e uppl.)Erven, Eugene van. Stages of People Power: The Philippines Educational Theater Association. The Hague: Center for the Study of Education in Developing Countries, 1989.
MLA-referens (9:e uppl.)Erven, Eugene van. Stages of People Power: The Philippines Educational Theater Association. Center for the Study of Education in Developing Countries, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.