Dennis Chambers ... [and others]
Gemini Books, 2000
Buku Referensi
Bear, Mariah
McGraw-Hill , 2000
Buku Teks SO
Clinton, Chelsea
Listening Library , 2015
Buku Teks
Seeley, Christopher
University of Hawaii Press, 2000
Buku Teks
Moh. Heri Kurniawan, examiner
London: Simon & Schuster, 1996,
Buku Teks