Pineda, H. C. (2018). Remembering Billy. UPDate Diliman.
Chicago Style aipamenaPineda, Haidee C. "Remembering Billy." UPDate Diliman 2018.
MLA aipamenaPineda, Haidee C. "Remembering Billy." UPDate Diliman, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.