Ciriani, Henri
Rockport Publishers, 1997
Buku Teks
Marlier, Georges, author
Arcade, 1967
Buku Referensi
Verhulst, Ferdinand, author
Springer, 2012
eBooks
Dondo, Mathurin
Philosophical Library, 1955
Buku Teks
Muhammad Ali, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2009
UI - Skripsi Open