Rowling, J. K. (1997). Harry Potter and the philosopher's stone. Bloomsbury.
Dyfyniad Arddull ChicagoRowling, J. K. Harry Potter and the Philosopher's Stone. London: Bloomsbury, 1997.
Dyfyniad MLARowling, J. K. Harry Potter and the Philosopher's Stone. Bloomsbury, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.