Employment, G. B. D. o. (1961). Watertight basements. London : HMSO.
Cita Chicago (17th ed.)Employment, Great Britain. Department of. Watertight Basements. London : HMSO, 1961.
Cita MLA (9th ed.)Employment, Great Britain. Department of. Watertight Basements. London : HMSO, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.