Government Service Insurance System (GSIS). (2011). GSIS art competition: 2011. [Government Service Insurance System].
Chicago-Zitierstil (17. Ausg.)Government Service Insurance System (GSIS). GSIS Art Competition: 2011. [Pasay City]: [Government Service Insurance System], 2011.
MLA-Zitierstil (9. Ausg.)Government Service Insurance System (GSIS). GSIS Art Competition: 2011. [Government Service Insurance System], 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.