MLA style (see MLA Style Manual and Guide to Scholarly Publishing, 3rd Ed.)
. "Gutyn Arfon."
The Canterbury Dictionary of Hymnology. Canterbury Press. Web. 15 Dec. 2018.<
http://www.hymnology.co.uk/g/gutyn-arfon>.
Chicago style (see The Chicago Manual of Style, 16th Ed.)
. "Gutyn Arfon."
The Canterbury Dictionary of Hymnology. Canterbury Press, accessed December 15, 2018,
http://www.hymnology.co.uk/g/gutyn-arfon.