APA (7th ed.) Citation

Co, D. A. (1973). Albay economic profile. s.n.].

Chicago Style (17th ed.) Citation

Co, Delfin A. Albay Economic Profile. [S.l: s.n.], 1973.

MLA (9th ed.) Citation

Co, Delfin A. Albay Economic Profile. s.n.], 1973.