Hirooka, Kyushi
PT Elex Media Komputindo, 2019
Buku Teks
Soyinka, Wale
McGraw-Hill, 2012
Buku Teks
Willard, Wendy
Osborne/McGraw-Hill, 2001
Buku Referensi
Luker, Leslie G.
Adana, 1973
Buku Teks
Simpkins, C. Alexander
Tuttle Publishing, 2021
Buku Teks