Symons, H. L. (1963). Playthings of yesterday: Harry Symons introduces the Percy Band Collection. Ryerson.
Chicago-Zitierstil (17. Ausg.)Symons, Harry Lutz. Playthings of Yesterday: Harry Symons Introduces the Percy Band Collection. Toronto: Ryerson, 1963.
MLA-Zitierstil (8. Ausg.)Symons, Harry Lutz. Playthings of Yesterday: Harry Symons Introduces the Percy Band Collection. Ryerson, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.