Citazione Stile APA (7a Edizione)

Julius. (2001). The secret of the secret city: Private collection / by Julius. Juliustoons.

Citazione stile Chigago Style (17a edizione)

Julius. The Secret of the Secret City: Private Collection / by Julius. [USA]: Juliustoons, 2001.

Citatione MLA (8a ed.)

Julius. The Secret of the Secret City: Private Collection / by Julius. Juliustoons, 2001.