Aiu Ahra
Sky
Gramedia Pustaka Utama, 2016
 Buku Teks
Winton, Tim
That eye, the sky
Australian Large Print, 1987
 Buku Teks SO
Volkov, A.
Earth and sky
Foreign Languages Publishing House, [Date of publication not identified]
 Buku Teks SO
Clarke, Arthur C.
The Other side of the sky
VGSF, 1987
 Buku Teks
Shaffer, Rick
Your guide to the sky
Lowell House, 1999
 Buku Referensi