APA (7th ed.) Citation

(1973). Slope map, province of Isabela. Institute of Planning.

Chicago Style (17th ed.) Citation

Slope Map, Province of Isabela. Manila: Institute of Planning, 1973.

MLA (9th ed.) Citation

Slope Map, Province of Isabela. Institute of Planning, 1973.

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