APA (7th ed.) Citation

(1976). Topographic map: Calamba, Laguna. [s.n.].

Chicago Style (17th ed.) Citation

Topographic Map: Calamba, Laguna. [Manila]: [s.n.], 1976.

MLA (9th ed.) Citation

Topographic Map: Calamba, Laguna. [s.n.], 1976.