Schwank, B. (2014). Palermo, Monreale, Kathedrale, Kreuzgang: = Palermo, Monreale, Cathedral, Cloisters. Images of the Biblical world online.
芝加哥风格引文Schwank, Benedikt. "Palermo, Monreale, Kathedrale, Kreuzgang: = Palermo, Monreale, Cathedral, Cloisters." Images of the Biblical World Online 2014.
MLA引文Schwank, Benedikt. "Palermo, Monreale, Kathedrale, Kreuzgang: = Palermo, Monreale, Cathedral, Cloisters." Images of the Biblical World Online, 2014.
警告：这些引文格式不一定是100％准确.