Harding, P. E. (1991). Foliar nutrient level studies in smallholder coffee gardens in the Kainantu area of Papua New Guinea. PNG Coffee research Institute.
Chicago Style (17th ed.) CitationHarding, Paul E. Foliar Nutrient Level Studies in Smallholder Coffee Gardens in the Kainantu Area of Papua New Guinea. PNG Coffee research Institute, 1991.
MLA (9th ed.) CitationHarding, Paul E. Foliar Nutrient Level Studies in Smallholder Coffee Gardens in the Kainantu Area of Papua New Guinea. PNG Coffee research Institute, 1991.
Warning: These citations may not always be 100% accurate.