Paul G. Richards

Saunders & Richards 1975，第72–79頁. Pine, L.G. A dictionary of mottoes 1. London: Routledge & Kegan Paul. 1983: 38. ISBN 0-7100-9339-X

alainduboisi Günther & Richards, 2018 Choerophryne allisoni Richards & Burton, 2003 Choerophryne alpestris (Kraus, 2010) Choerophryne amomani Günther, 2008

2201-4349.72.2020.1729 Rainer Günther, Stephen J. Richards, Amir Hamidy, Wahyu Trilaksono, Taufan N. Sulaeman and Paul M. Oliver. 2023. A New large Green

Hylophorbus tetraphonus Günther, 2001 Hylophorbus wondiwoi Günther, 2001 Flavien Ferreira, Fred Kraus, Stephen Richards, Paul Oliver, Rainer Günther, Wahyu Trilaksono

doi:10.1016/j.tree.2006.08.002. PMID 16901581 Wilkinson, Marshall T.; Richards, Paul J.; Humphreys, Geoff S. (2009-12-01). "Breaking ground: Pedological