Não informado. World calendar of forthcoming meetings. Iron and Steel Institute.
Chicago-viite (17. p.)Não informado. World Calendar of Forthcoming Meetings. London: Iron and Steel Institute.
MLA-viite (8. p.)Não informado. World Calendar of Forthcoming Meetings. Iron and Steel Institute.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.