What's the difference between PG and SPG?

What's the difference between PG and SPG?

Bibliografiset tiedot
Julkaisussa:Philippine Star (16 Feb. 2012), C-1
Päätekijä: Lo, Ricardo F.
Aineistotyyppi: Artikkeli
Kieli:English
Julkaistu: 2012
Aiheet:
Philippines. Movies and Television Review and Classification Board
Television programs > Philippines > Rating