Cita APA (7th ed.)

Orr, K. T. (1977). Structured systems development. Yourdon Press.

Cita Chicago (17th ed.)

Orr, Kenneth T. Structured Systems Development. Englewood Cliffs, N. J: Yourdon Press, 1977.

Cita MLA (9th ed.)

Orr, Kenneth T. Structured Systems Development. Yourdon Press, 1977.