APA (7th ed.) Citation

Barkman, Beaman, & Tan. (2001). ORCHIDS of Sarawak. Natural History Pub..

Chicago Style (17th ed.) Citation

Barkman, Beaman, and Tan. ORCHIDS of Sarawak. Kota Kinabalu, Sabah: Natural History Pub., 2001.

MLA (9th ed.) Citation

Barkman, et al. ORCHIDS of Sarawak. Natural History Pub., 2001.