Elliott, P. (2007). Richard Long: Walking and Marking. Trustees of the National Gallery of Scotland.
Chicago-Zitierstil (17. Ausg.)Elliott, Patrick. Richard Long: Walking and Marking. Edinburgh: Trustees of the National Gallery of Scotland, 2007.
MLA-Zitierstil (8. Ausg.)Elliott, Patrick. Richard Long: Walking and Marking. Trustees of the National Gallery of Scotland, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.