Philippines (Republic) Bureau of Lands. (1962). Philippine land surveyors manual. Certeza Surveying.
Lua i Stíl Chicago (17ú heag.)Philippines (Republic) Bureau of Lands. Philippine Land Surveyors Manual. Manila: Certeza Surveying, 1962.
Lua MLA (9ú heag.)Philippines (Republic) Bureau of Lands. Philippine Land Surveyors Manual. Certeza Surveying, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.