^Ross, David A. (2009). Critical Companion to William Butler Yeats: A Literary Reference to His Life and Work. Facts on File Library of World Literature. New York: Facts on File. p. 605.
ISBN978-0-8160-5895-2.
^
abcHayes, Dean (2006). Northern Ireland International Football Facts. Belfast: Appletree Press. pp. 159–160.
ISBN0-86281-874-5.
^Ross, David A. (2009). Critical Companion to William Butler Yeats: A Literary Reference to His Life and Work. Facts on File Library of World Literature. New York: Facts on File. p. 605.
ISBN978-0-8160-5895-2.
^
abcHayes, Dean (2006). Northern Ireland International Football Facts. Belfast: Appletree Press. pp. 159–160.
ISBN0-86281-874-5.