Harding, P. E. (1991). Foliar nutrient level studies in fertilised coffee in the Eastern and Western Highlands Provinces of Papua New Guinea. PNG Coffee Research Institute.
Chicago Style (17th ed.) CitationHarding, Paul E. Foliar Nutrient Level Studies in Fertilised Coffee in the Eastern and Western Highlands Provinces of Papua New Guinea. Kainantu, E.H.P.: PNG Coffee Research Institute, 1991.
MLA (9th ed.) CitationHarding, Paul E. Foliar Nutrient Level Studies in Fertilised Coffee in the Eastern and Western Highlands Provinces of Papua New Guinea. PNG Coffee Research Institute, 1991.
Warning: These citations may not always be 100% accurate.