APA (7th ed.) Citation

Nelson, E. C. (1991). Shamrock: Botany and history of an Irish myth. Boethius.

Chicago Style (17th ed.) Citation

Nelson, E. Charles. Shamrock: Botany and History of an Irish Myth. Kilkenny, Ireland: Boethius, 1991.

MLA (9th ed.) Citation

Nelson, E. Charles. Shamrock: Botany and History of an Irish Myth. Boethius, 1991.