Simpson, A., Woodcock, J., & Davies, J. (1997). The Mechanical Verification of Solid State Interlocking Geographic Data. Springer.
Cita Chicago (17th ed.)Simpson, A., J. Woodcock, i J. Davies. The Mechanical Verification of Solid State Interlocking Geographic Data. Springer, 1997.
Cita MLA (9th ed.)Simpson, A., et al. The Mechanical Verification of Solid State Interlocking Geographic Data. Springer, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.