(1951). Masonry- rubble walls. London: The Council for Codes of Practice for Buildings.
Παραπομπή Chicago StyleMasonry- Rubble Walls. London: The Council for Codes of Practice for Buildings, 1951.
Παραπομπή MLAMasonry- Rubble Walls. London: The Council for Codes of Practice for Buildings, 1951.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.