APA (7th ed.) Citation

Duff, J. B. (1971). The Irish in the United States. Wadsworth.

Chicago Style (17th ed.) Citation

Duff, John B. The Irish in the United States. Belmont, Cal: Wadsworth, 1971.

MLA (9th ed.) Citation

Duff, John B. The Irish in the United States. Wadsworth, 1971.