The following sources were used for this website:
Singapore PictureBy Chensiyuan. – Own work, CC BY-SA 4.0https://commons.wikimedia.org/w/index.php?curid=19224768
Lausanne PictureBy Gabriel Garcia Marengohttps://creativecommons.org/licenses/by/2.0/
Paradeplatz PictureBy Andreas Praefcke – Self-photographed, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=2273511
Sihlpost Picturehttps://company.sbb.ch/de/ueber-die-sbb/profil/sbb-erleben/sbb-erlebnisse/europaallee.html