Não informado. Forthcoming International Scientific and Technical Conferences. Department of Education and Science.
Chicago-viite (17. p.)Não informado. Forthcoming International Scientific and Technical Conferences. London: Department of Education and Science.
MLA-viite (8. p.)Não informado. Forthcoming International Scientific and Technical Conferences. Department of Education and Science.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.