Deleu, J
Rekkem Stichting Ons Erfdeel 1990
Buku Teks
Ariyani Maulina, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2009
UI - Skripsi (Open)
Jonkman, J. A.
Van Gorcum & Company N.V., 1971
Buku Teks
Brugmans, H., author
Scheltema & Holkema`s, [Date of publication not identified]
Buku Teks
Loosjes, A., author
Scheltema & Holkema`s, [Date of publication not identified]
Buku Teks