APA (7th ed.) Citation

Twohig, P. J. (1991). The dark secret of Béalnabláth. Tower Books.

Chicago Style (17th ed.) Citation

Twohig, Patrick J. The Dark Secret of Béalnabláth. Cork (Ireland): Tower Books, 1991.

MLA (9th ed.) Citation

Twohig, Patrick J. The Dark Secret of Béalnabláth. Tower Books, 1991.