Puti Lenggo
Ratu cinta, the 7th heaven
Yayasan Obor Indonesia, 2008
 Buku Teks SO
Kawakami, Mieko
Heaven
KPG (Kepustakaan Popular Gramedia), 2024
 Buku Teks SO
Ensiklopedi anak nasional, vol. 8
Jakarta : Cipta Adi Pustaka, 1991,
 Buku Referensi
Rourke's world of science encyclopedia vol. 8 : mathematics
Rourke Publishing LLC, 2009
 Buku Referensi
Progress in heat and mass transfer; vol. 8
edited by E.R.G. Eckert
Pergamon Press, 1977
 Buku Teks SO