Cita APA (7th ed.)

Gloria Cunanan Maphouse. (1989). Map of Northern Samar (1989 ed.). Gloria Cunanan Maphouse.

Cita Chicago (17th ed.)

Gloria Cunanan Maphouse. Map of Northern Samar. 1989 ed. Makati, Metro Manila: Gloria Cunanan Maphouse, 1989.

Cita MLA (9th ed.)

Gloria Cunanan Maphouse. Map of Northern Samar. 1989 ed. Gloria Cunanan Maphouse, 1989.