In addition to educational and reference books, you should use scientific articles related to the subject of theses and summaries of scientific conferences, law and other regulations.
Ngaphezu izincwadi zemfundo kanye inkomba, qiniseka ukusebenzisa izihloko zesayensi ezihlobene isihloko idiploma zomgunyathi nezindaba eziphathelene izifushaniso izingqungquthela yesayensi, imithetho kanye nezinye iziqondiso.