Gasper, D. (1996). A clarification of meanings, levels and different streams of work. ISS.
Chicago-Zitierstil (17. Ausg.)Gasper, Des. A Clarification of Meanings, Levels and Different Streams of Work. The Hague: ISS, 1996.
MLA-Zitierstil (9. Ausg.)Gasper, Des. A Clarification of Meanings, Levels and Different Streams of Work. ISS, 1996.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.