Dickinson, Leslie, author
Cambridge University Press , 1987
Buku Teks
Dickinson, Leslie
Cambridge University Press , 1988
Buku Teks
Meliala, Dianisa Gyanina, author
2016
UI - Tesis (Membership)
Reid, James M., author
McGraw-Hill, 1978
Buku Teks
Beatty, Ken, author
Pearson Education, 2003
Buku Teks