@book {724,
	title = {A Complete Guide to the Frogs of Southern Africa},
	year = {2009},
	pages = {488},
	publisher = {Struik Nature},
	organization = {Struik Nature},
	address = {Cape Town},
	issn = {9781770074460},
	author = {Du Preez, L. and V.C. Carruthers}
}
@book {2503,
	title = {A complete guide to the frogs of Southern Africa},
	year = {2009},
	pages = {488},
	publisher = {Random House Struik Publishers},
	organization = {Random House Struik Publishers},
	address = {Cape Town, South Africa},
	url = {http://www.nwu.ac.za/sites/default/files/images/frogkey.pdf},
	author = {Du Preez, L. and Carruthers, V. and Burger, M.}
}
