APA (7th ed.) Citation

Johns, R. J. (1987). The flowering plants of Papuasia: Dicotyledons. P.N.G. University of Technology, Forestry Dept..

Chicago Style (17th ed.) Citation

Johns, Robert J. The Flowering Plants of Papuasia: Dicotyledons. Lae: P.N.G. University of Technology, Forestry Dept., 1987.

MLA (9th ed.) Citation

Johns, Robert J. The Flowering Plants of Papuasia: Dicotyledons. P.N.G. University of Technology, Forestry Dept., 1987.