Clark, N. P. (1970). The effects of the use of self-directed learning activities on achievement and petention among college students. Univ.Microfilms.
Chicago-Zitierstil (17. Ausg.)Clark, Neil P. The Effects of the Use of Self-directed Learning Activities on Achievement and Petention Among College Students. Ann Arbor, Mich: Univ.Microfilms, 1970.
MLA-Zitierstil (9. Ausg.)Clark, Neil P. The Effects of the Use of Self-directed Learning Activities on Achievement and Petention Among College Students. Univ.Microfilms, 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.