| Publication Type: | Book |
| Year of Publication: | 2009 |
| Authors: | D. L. Preez, Carruthers, V., Burger, M. |
| Number of Pages: | 488 |
| Publisher: | Random House Struik Publishers |
| City: | Cape Town, South Africa |
| URL: | http://www.nwu.ac.za/sites/default/files/images/frogkey.pdf |