APA (7th ed.) Citation

Royen, P. v. (1980). The orchids of the high mountains of New Guinea. Cramer.

Chicago Style (17th ed.) Citation

Royen, P. van. The Orchids of the High Mountains of New Guinea. Vaduz [Liechtenstein ]: Cramer, 1980.

MLA (9th ed.) Citation

Royen, P. van. The Orchids of the High Mountains of New Guinea. Cramer, 1980.