Não informado. (1968). World meetings outside United States and Canada. Technical Meetings Information Service.
Chicago-Zitierstil (17. Ausg.)Não informado. World Meetings Outside United States and Canada. Newton Centre, Mass: Technical Meetings Information Service, 1968.
MLA-Zitierstil (8. Ausg.)Não informado. World Meetings Outside United States and Canada. Technical Meetings Information Service, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.