APA-Zitierstil (7. Ausg.)

(2013). Philadelphia: Philadelphia Downtown, University City, Fairmount Park, Philadelphia & region ; updated, durable, water repellent, write-on/wipe-off surface (10. ed.). Borch.

Chicago-Zitierstil (17. Ausg.)

Philadelphia: Philadelphia Downtown, University City, Fairmount Park, Philadelphia & Region ; Updated, Durable, Water Repellent, Write-on/wipe-off Surface. 10. ed. [Hautzenberg]: Borch, 2013.

MLA-Zitierstil (9. Ausg.)

Philadelphia: Philadelphia Downtown, University City, Fairmount Park, Philadelphia & Region ; Updated, Durable, Water Repellent, Write-on/wipe-off Surface. 10. ed. Borch, 2013.