APA (7th ed.) Citation

Papua New Guinea. Curriculum Unit. (1981). Ecology: Science teachers guide, grade 9, unit 7. The Dept..

Chicago Style (17th ed.) Citation

Papua New Guinea. Curriculum Unit. Ecology: Science Teachers Guide, Grade 9, Unit 7. Port Moresby: The Dept., 1981.

MLA (9th ed.) Citation

Papua New Guinea. Curriculum Unit. Ecology: Science Teachers Guide, Grade 9, Unit 7. The Dept., 1981.