Cita APA (7th ed.)

Langefors, B. (1973). Theoretical analysis of information systems (4th ed.). Studentlitteratur; Auerbach.

Cita Chicago (17th ed.)

Langefors, Borje. Theoretical Analysis of Information Systems. 4th ed. [Lund] Sweden, Philadelphia: Studentlitteratur; Auerbach, 1973.

Cita MLA (8th ed.)

Langefors, Borje. Theoretical Analysis of Information Systems. 4th ed. Studentlitteratur; Auerbach, 1973.