APA (7e ed.) Bronvermelding

Sotto, R. J. B. (2008). A test development research: Sotto-Tolentino global assessment of functioning questionnaire. University of the Philippines Diliman Extension Program in Pampanga.

Chicago (17e ed.) Bronvermelding

Sotto, Romeulus John B. A Test Development Research: Sotto-Tolentino Global Assessment of Functioning Questionnaire. Pampanga: University of the Philippines Diliman Extension Program in Pampanga, 2008.

MLA (9e ed.) Bronvermelding

Sotto, Romeulus John B. A Test Development Research: Sotto-Tolentino Global Assessment of Functioning Questionnaire. University of the Philippines Diliman Extension Program in Pampanga, 2008.