APA (7th ed.) Citation

Papua New Guinea. National Statistical Office. (1991). 1990 national population census: Preliminary figures : census division population. National Statistical Office.

Chicago Style (17th ed.) Citation

Papua New Guinea. National Statistical Office. 1990 National Population Census: Preliminary Figures : Census Division Population. Port Moresby: National Statistical Office, 1991.

MLA (9th ed.) Citation

Papua New Guinea. National Statistical Office. 1990 National Population Census: Preliminary Figures : Census Division Population. National Statistical Office, 1991.