APA
Ministry of Housing and Local Government, . (1969). Technical Memorandum on Activated Sludge Sewage Treatment Installations providing for a long period of Aeration. London: H.M.S.O. LONDOAN.
Chicago
Ministry of Housing and Local Government, . 1969. Technical Memorandum on Activated Sludge Sewage Treatment Installations providing for a long period of Aeration. London: H.M.S.O. LONDOAN.
Harvard
Ministry of Housing and Local Government, . (1969). Technical Memorandum on Activated Sludge Sewage Treatment Installations providing for a long period of Aeration. London: H.M.S.O. LONDOAN.
MLA
Ministry of Housing and Local Government, . Technical Memorandum on Activated Sludge Sewage Treatment Installations providing for a long period of Aeration. London: H.M.S.O. LONDOAN. 1969.