Wong, Caroline, author
McGraw-Hill , 2012
Buku Teks
Willard, Wendy, author
Osborne/McGraw-Hill, 2001
Buku Referensi
Soyinka, Wale, author
McGraw-Hill, 2012
Buku Teks
Hirooka, Kyushi, author
PT Elex Media Komputindo, 2019
Buku Teks
Shipps, Steve, author
Blackwell Publishing, 2008
Buku Teks