(2021). SPP 97. URI:https://journals.openedition.org/spp.
Style de citation Chicago (17e éd.)"SPP 97." URI:https://journals.openedition.org/spp 2021.
Style de citation MLA (8e éd.)"SPP 97." URI:https://journals.openedition.org/spp, 2021.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.