edited by Alberto Perez-Gomez and Stephen Parcell
McGill-Queen's U Prees, 1994
Buku Teks
Senat Mahasiswa STF Driyarkara, 2015
Majalah, Jurnal, Buletin
Greenwood Press, 1977
Buku Referensi
Ziman, John
Cambridge University Press, 1994
Buku Teks SO
Piovesana, Gino K.
Enderle Bookstore, 1963
Buku Teks SO