Artikel Jurnal
Le Dantec, Denise
MIT Press, 1990
Buku Teks
Parents' Magazine's Cultural Institute, 1965
Buku Referensi
Busch, Moel F.
American Heritage Pub. Co., 1972
Buku Teks
edited by M.A.P. Meilink-Roelofsz, M.E. van Opstall, G.J. Schutte
Foris, 1988
Buku Teks