Tietjen, F. (2003). You can`t escape relating back to facts. Camera Austria.
Chicago-Zitierstil (17. Ausg.)Tietjen, Friedrich. "You Can`t Escape Relating Back to Facts." Camera Austria 2003.
MLA-Zitierstil (8. Ausg.)Tietjen, Friedrich. "You Can`t Escape Relating Back to Facts." Camera Austria, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.