APA (7th ed.) Citation

Johns, R. J., & Bellamy, A. (1979). The ferns and fern allies of Papua New Guinea. Papua New Guinea University of Technology.

Chicago Style (17th ed.) Citation

Johns, Robert J., and A. Bellamy. The Ferns and Fern Allies of Papua New Guinea. Lae: Papua New Guinea University of Technology, 1979.

MLA (9th ed.) Citation

Johns, Robert J., and A. Bellamy. The Ferns and Fern Allies of Papua New Guinea. Papua New Guinea University of Technology, 1979.