Henry, J. P., & Henry, J. P. (1908). Ceachta cainnte an mhúinteóra: Cuid a haon = A conversational guide for teachers on the direct method, with special application to the Handbook of modern Irish (2nd ed.). M.H. Gill.

Henry, John Patrick, and John Patrick Henry. Ceachta Cainnte an Mhúinteóra: Cuid a Haon = A Conversational Guide for Teachers on the Direct Method, with Special Application to the Handbook of Modern Irish. 2nd ed. M.H. Gill, 1908.