- Academia Scientific Book Inc.
- Agentschap Plantentuin Meise
- Arkib Negara Malaysia
- BBC Wildlife Magazine
- Birdlife International
- Bombay Natural History Society
- Botanic Gardens, Singapore
- Brigham Young University
- CAB International
- Cambridge University Library
- Conservatoire et Jardin Botanique
- CORNELL UNIVERSITY LIB
- Department of Environment
- Forest Research Centre
- Freie Universitat Berlin
- Garden International School
- Institut Teknologi Mara
- IUCN Library
- Kementrian Dalam Negeri
- Kolej Universiti Tunku Abdul Rahman
- Ministry of Natural Resources & Environment
- Muzium Negara
- National Museum of Kenya
- Naturalis
- Nature Society (Singapore)
- Oriental Bird Club
- ORYX – African Wildlife Foundation
- Perpustakaan Awam
- Perpustakaan Negara Malaysia
- Perpustakaan Negeri Sabah
- Persatuan Perhutanan Malaysia
- Phuket Marine Biology Center
- Siam Society, Library
- The British Library
- The Natural History Museum
- Univ of California, Berkeley
- Wildlife Society Inc.
- WWF – Malaysia