Cita APA (7a ed.)

Pred, A., & Törnqvist, G. (1973). Systems of cities and information flows: Two essays. The Royal University of Lund, Department of geographic : C. W. K. Gleerup.

Cita Chicago Style (17a ed.)

Pred, Allan, y Gunnar Törnqvist. Systems of Cities and Information Flows: Two Essays. Lund: The Royal University of Lund, Department of geographic : C. W. K. Gleerup, 1973.

Cita MLA (9a ed.)

Pred, Allan, y Gunnar Törnqvist. Systems of Cities and Information Flows: Two Essays. The Royal University of Lund, Department of geographic : C. W. K. Gleerup, 1973.