APA aipamena

Philippines. National Manpower and Youth Council (Region I). (1983). Regional profile, Region I. NMYC.

Chicago Style aipamena

Philippines. National Manpower and Youth Council (Region I). Regional Profile, Region I. San Fernando, La Union: NMYC, 1983.

MLA aipamena

Philippines. National Manpower and Youth Council (Region I). Regional Profile, Region I. NMYC, 1983.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.