(2006). Inside the black box of doctoral education: What program characteristics influence doctoral students' attrition and graduation probabilities? National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)Inside the Black Box of Doctoral Education: What Program Characteristics Influence Doctoral Students' Attrition and Graduation Probabilities? Cambridge, Mass: National Bureau of Economic Research, 2006.
MLA-Zitierstil (9. Ausg.)Inside the Black Box of Doctoral Education: What Program Characteristics Influence Doctoral Students' Attrition and Graduation Probabilities? National Bureau of Economic Research, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.