Spawls, S.; Howell, K.; Drewes, R.C.; Ashe, J.
2002
A field guide to the reptiles of East Africa: Kenya, Tanzania, Uganda, Rwanda and Burundi. 1st ed. Academic Press, London & California. 543 pp.
(Reprinted with corrections in 2004).
Later editions:
Spawls, S.; Howell, K.M.; Hinkel, H.; Menegon, M.
2018
Field Guide to East African Reptiles. 3rd ed. Cristopher Helm, London. 624 pp.