APA (7th ed.) Citation

Natividad, N. M. (1974). Soil survey of Abra province, Philippines: A reconnaissance soil survey. Government Printing Office.

Chicago Style (17th ed.) Citation

Natividad, Narciso M. Soil Survey of Abra Province, Philippines: A Reconnaissance Soil Survey. Manila: Government Printing Office, 1974.

MLA (9th ed.) Citation

Natividad, Narciso M. Soil Survey of Abra Province, Philippines: A Reconnaissance Soil Survey. Government Printing Office, 1974.

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