APA (7th ed.) Citation

Cagayan Valley region: Batanes, Cagayan, Ifugao, Isabela, Kalinga-Apayao, Nueva Vizcaya. s.n.

Chicago Style (17th ed.) Citation

Cagayan Valley Region: Batanes, Cagayan, Ifugao, Isabela, Kalinga-Apayao, Nueva Vizcaya. [S.l: s.n.

MLA (9th ed.) Citation

Cagayan Valley Region: Batanes, Cagayan, Ifugao, Isabela, Kalinga-Apayao, Nueva Vizcaya. s.n.

Warning: These citations may not always be 100% accurate.