APA (7th ed.) Citation

Costigan, G. (1969). A history of modern Ireland: With a sketch of earlier times. Pegasus.

Chicago Style (17th ed.) Citation

Costigan, Giovanni. A History of Modern Ireland: With a Sketch of Earlier Times. New York: Pegasus, 1969.

MLA (9th ed.) Citation

Costigan, Giovanni. A History of Modern Ireland: With a Sketch of Earlier Times. Pegasus, 1969.

Warning: These citations may not always be 100% accurate.