@book{757120,
	author = {CM Pretorius and HG Erasmus},
	title = { Basic programming principles},
	publisher = { Pearson, },
	year = {2012},
	address = {Cape Town,},
	edition = {Second edition},
	note = {The ability to clearly specify each step to create a problem-free computer program is a primary skill needed by programmers.}
}