Roland, Betty, author
NWS Collins Publisher , 1989
Buku Teks
Schmid, Roland
Helmut Schmid Verlag Regensburg , [date of publication not identified]
Buku Teks
Roland, Betty, author
Collins Publisher, 1989
Buku Teks
Roland, Betty, author
Hale & Iremonger, 1984
Buku Teks
Braddell, Roland
Oxford University Press, 1982
Buku Teks