APA (7e ed.) Bronvermelding

Heap, G. (1992). Structures approach to systems development. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Heap, Gary. Structures Approach to Systems Development. London: McGraw-Hill, 1992.

MLA (9e ed.) Bronvermelding

Heap, Gary. Structures Approach to Systems Development. McGraw-Hill, 1992.

Let op: Deze citaties zijn niet altijd 100% accuraat.