Gaya APA
Mannheim, K.
(1969).
Essays on sociology and social psychology. Ed.& introd.by Paul Kecskemeti.
.
London:
RKP.
Gaya MLA
Mannheim, Karl.
"Essays on sociology and social psychology. Ed.& introd.by Paul Kecskemeti. ".
London:
RKP,
1969.
Buku.