Pickering, D., Bannister, D. H., & Park, J. (1993). Utility mapping and record keeping for infrastructure. World Bank.
Cita Chicago (17th ed.)Pickering, David, David H. Bannister, i Jonathan Park. Utility Mapping and Record Keeping for Infrastructure. Washington, D.C: World Bank, 1993.
Cita MLA (9th ed.)Pickering, David, et al. Utility Mapping and Record Keeping for Infrastructure. World Bank, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.