Pickering, D. (1993). Utility mapping and record keeping for: Infrastructure. The World Bank.
Cita Chicago (17th ed.)Pickering, David. Utility Mapping and Record Keeping for: Infrastructure. Washington, D.C.: The World Bank, 1993.
Cita MLA (9th ed.)Pickering, David. Utility Mapping and Record Keeping for: Infrastructure. The World Bank, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.