Julius. (2001). The secret of the secret city: Private collection / by Julius. Juliustoons.
Chicago-Zitierstil (17. Ausg.)Julius. The Secret of the Secret City: Private Collection / by Julius. [USA]: Juliustoons, 2001.
MLA-Zitierstil (8. Ausg.)Julius. The Secret of the Secret City: Private Collection / by Julius. Juliustoons, 2001.
警告：这些引文格式不一定是100％准确.