APA (7e ed.) Bronvermelding

Ortigas, C. D. (1997). Group process and the industries methods: Theory and practices in the Philippines (3rd ed.). Ateneo de Manila University Press.

Chicago (17e ed.) Bronvermelding

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 (9e ed.) Bronvermelding

Ortigas, Carmela D. Group Process and the Industries Methods: Theory and Practices in the Philippines. 3rd ed. Ateneo de Manila University Press, 1997.