Não informado. (1972). Construction plant and equipment. Morgan Grampian.
Chicago-viite (17. p.)Não informado. Construction Plant and Equipment. London: Morgan Grampian, 1972.
MLA-viite (8. p.)Não informado. Construction Plant and Equipment. Morgan Grampian, 1972.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.