Bibliografi : hlm. 574-577
Bibliografi : hlm. 323-341
Bibliografi : hlm. 115
Bibliografi : hlm. 324-315
Judul asli : "Concepts in social thoughtn socialism"
Judul asli : "Research Methods and Analysis Searching for Relationahips"
No Inv.: 5448-5452/P/Perp/99/5c
No Inv.: 119851-119853/P/Perp/09/3c