Nanda Dian Windy Lestari, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Makalah dan Kertas Kerja
McKay, John P., author
Houghton Miffiln, 1984
Buku Teks
edited by S.J. De Leat, A.H. Dani, J.L. Lorenzo and R.B. Nunoo
Routledge , 1994
Buku Referensi
Burns, Edward McNall, 1897-1972, author
W.W. Norton & Company, 1973
Buku Teks
edited by Donald Baker ... [and others]
Columbia University Press , 1993
Buku Teks