Blais, Marie-Claire, 1939-
Nights in the underground
General, 1939
 Buku Teks
Weedy, B.M.
Underground transmission of electric power
John Wiley & Sons, 1980
 Buku Teks
Saharil Hasrin Sanin
Lagi cerpen-cerpen underground
Book Antiqua, 2002
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Simonin, Louis
Underground life: or, mines and miners
Cambridge University Press, 2014
 eBooks
Cyech Maulana Hizboel Wathony Ibrahim
Allah itu nyata
Yayasan Akmaliyah, 2014
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