APA (7th ed.) Citation

Johns, R. J. (1979). The ferns and fern allies of the Central, Western and South Pacific Basin. Forestry Dept., P.N.G. Unitech.

Chicago Style (17th ed.) Citation

Johns, R. J. The Ferns and Fern Allies of the Central, Western and South Pacific Basin. Lae: Forestry Dept., P.N.G. Unitech, 1979.

MLA (9th ed.) Citation

Johns, R. J. The Ferns and Fern Allies of the Central, Western and South Pacific Basin. Forestry Dept., P.N.G. Unitech, 1979.