Potgieter, Jenni-Marí; Swanepoel, De Wet; Heinze, Barbara M.; Hofmeyr, Louis Murray; Burger, André A.S.; Hamersma, Herman(Cambridge University Press, 2014-04)
Lawrence, Blake J.; Jayakody, Dona M.P.; Henshaw, Helen; Ferguson, Melanie A.; Eikelboom, Robert H.; Loftus, Andrea M.; Friedland, Peter L.(Sage, 2018)