Sorensen, Georg, author
Pustaka Pelajar, 2003
Buku Teks
Artikel Jurnal
Dahl, Robert A., 1915-2014, author
Yayasan Pustaka Obor Indonesia, 1992
Buku Teks
Muhammad A.S. Hikam, author
LP3ES, 1999
Buku Teks
Dahl, Robert A., 1915-2014, author
Yayasan Obor Indonesia , 1992
Buku Teks