APA-viite (7. p.)

Certeza Surveying Co., Inc. (1965). Proposals on property tax maps preparations of Tarlac province. s.n.

Chicago-viite (17. p.)

Certeza Surveying Co., Inc. Proposals on Property Tax Maps Preparations of Tarlac Province. [Quezon City: s.n, 1965.

MLA-viite (9. p.)

Certeza Surveying Co., Inc. Proposals on Property Tax Maps Preparations of Tarlac Province. s.n, 1965.