APA (7th ed.) Citation

Williams, G. (1970). An introduction to Welsh poetry, from the beginnings to the sixteenth century. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Williams, Gwyn. An Introduction to Welsh Poetry, from the Beginnings to the Sixteenth Century. Freeport, N.Y.: Books for Libraries Press, 1970.

MLA (9th ed.) Citation

Williams, Gwyn. An Introduction to Welsh Poetry, from the Beginnings to the Sixteenth Century. Books for Libraries Press, 1970.