Asrika Mayang Puti
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2009
UI - Skripsi Open
edited by Norman Page
Macmillan, 1984
Buku Teks SO
Epstein, E.L.
Methuen, 1978
Buku Teks SO
Baker, Sheridan
Thomas Y. Crowell, 1966
Buku Teks SO
Webber, John
University of Wisconsin Press, 1968
Buku Teks SO