Brook, R. M., & Humphrey, B. (1992). Sustainable agriculture: A review of research in Papua New Guinea up to 1989. Lowlands Agricultural Experiment Station.
Chicago Style (17th ed.) CitationBrook, Robert M., and Bill Humphrey. Sustainable Agriculture: A Review of Research in Papua New Guinea Up to 1989. [Kerevat]: Lowlands Agricultural Experiment Station, 1992.
MLA (9th ed.) CitationBrook, Robert M., and Bill Humphrey. Sustainable Agriculture: A Review of Research in Papua New Guinea Up to 1989. Lowlands Agricultural Experiment Station, 1992.
Warning: These citations may not always be 100% accurate.