APA (7e ed.) Bronvermelding

Beltran, A. (2001). A test development research: Liberalism questionnaire. University of the Philippines Diliman Extension Program in Pampanga.

Chicago (17e ed.) Bronvermelding

Beltran, Aireen. A Test Development Research: Liberalism Questionnaire. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2001.

MLA (9e ed.) Bronvermelding

Beltran, Aireen. A Test Development Research: Liberalism Questionnaire. University of the Philippines Diliman Extension Program in Pampanga, 2001.