Philippines (Rep.) National Statistical Coordination Board. (1997). 1997 Philippine statistical yearbook. National Statistical Coordination Board.
Chicago-referens (17:e uppl.)Philippines (Rep.) National Statistical Coordination Board. 1997 Philippine Statistical Yearbook. Makati City: National Statistical Coordination Board, 1997.
MLA-referens (9:e uppl.)Philippines (Rep.) National Statistical Coordination Board. 1997 Philippine Statistical Yearbook. National Statistical Coordination Board, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.