Stevens, Alan M., author
Ohio University Press, 2004
Buku Referensi
Echols, John M., author
Bhratara, 1963
Buku Referensi
Echols, John M., author
Gramedia, 1980
Buku Referensi
Echols, John M., author
Gramedia, 1980
Buku Referensi
editor, Peter Salim
Modern English Press, 1990
Buku Referensi