APA (7th ed.) Citation

van Royen, P. (1963). The vegetation of the island of New Guinea. Dept. of Forests.

Chicago Style (17th ed.) Citation

van Royen, P. The Vegetation of the Island of New Guinea. Lae, PNG: Dept. of Forests, 1963.

MLA (9th ed.) Citation

van Royen, P. The Vegetation of the Island of New Guinea. Dept. of Forests, 1963.

Warning: These citations may not always be 100% accurate.