Lefer, P. (1971). The measurement of scientific activities in the social sciences and the humanities. Unesco.
Chicago-Zitierstil (17. Ausg.)Lefer, Pierre. The Measurement of Scientific Activities in the Social Sciences and the Humanities. Paris: Unesco, 1971.
MLA-Zitierstil (9. Ausg.)Lefer, Pierre. The Measurement of Scientific Activities in the Social Sciences and the Humanities. Unesco, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.