Gaya APA

Nursi, B, S. (2011). The Supreme Sign : The Observations of a Traveller Questioning the Universe Concerning His Maker . Istanbul: Sozler Nesriyat.

Gaya MLA

Nursi, Badiuzzaman, Said. "The Supreme Sign : The Observations of a Traveller Questioning the Universe Concerning His Maker". Istanbul: Sozler Nesriyat, 2011. Text.