^Angelopulo, Rachel Barker; George (2006). Integrated organisational communication. Cape Town: Juta Academic. ISBN0702166642.{{cite book}}: CS1 maint: multiple names: authors list (link)
^Mohr, Philip (2004). Economics for South African students (3rd ed.). Pretoria: Van Schaik. ISBN0627025544. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
^Meddaugh, Susan (1996). Martha blah blah. Boston: Houghton Mifflin. ISBN0395901189.
^Mohr, Philip (2004). Economics for South African students (3rd ed.). Pretoria: Van Schaik. ISBN0627025544. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)