Lenssen, P. (1973). C.R.O.C.S.: A Swiss industrialised school building system : leaflet. Organisation for Economic Co-operation and Development.
Chicago Style (17th ed.) CitationLenssen, Paul. C.R.O.C.S.: A Swiss Industrialised School Building System : Leaflet. Paris: Organisation for Economic Co-operation and Development, 1973.
MLA (8th ed.) CitationLenssen, Paul. C.R.O.C.S.: A Swiss Industrialised School Building System : Leaflet. Organisation for Economic Co-operation and Development, 1973.
Warning: These citations may not always be 100% accurate.