Phan Thi Hoa Ly, author
ISEAS/BUFS, 2019
Artikel Jurnal
Higgins, Hugh, author
Heinemann Educational, 1975
Buku Teks
Frey, Katherine Stenger, author
Gramedia, 1986
Buku Referensi
Frey, Katherine Stenger, author
Gramedia, 1986
Buku Teks SO
Frey, Katherine Stenger, author
Gramedia, 1986
Buku Teks SO