Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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