Progress in psychology of personality :
XXIInd International Congress of Psychology, Leipzig GDR, July 6-12, 1980 : selected revised papers /
edited by Adolf Kossakowski and Kazimierz Obuchowski.
APA Citation
International Congress of Psychology. (22nd : 1980 : Leipzig, G., Obuchowski, K., Kossakowski, A. (1982). Progress in psychology of personality: XXIInd International Congress of Psychology, Leipzig GDR, July 6-12, 1980 : selected revised papers. Amsterdam: North-Holland Pub. Co. .
MLA Citation
International Congress of Psychology. (22nd : 1980 : Leipzig, Germany), Kazimierz Obuchowski, and Adolf Kossakowski. Progress In Psychology of Personality: XXIInd International Congress of Psychology, Leipzig GDR, July 6-12, 1980 : Selected Revised Papers. Amsterdam: North-Holland Pub. Co. , 1982.
Warning: These citations may not always be complete (especially for serials).