APA (7th ed.) Citation

O'Brien, R. J., & Twombly, N. J. (1961). A basic course in Latin / by R.J. O'Brien and N.J. Twombly. Loyola U.P..

Chicago Style (17th ed.) Citation

O'Brien, R. J., and N. J. Twombly. A Basic Course in Latin / by R.J. O'Brien and N.J. Twombly. Loyola U.P., 1961.

MLA (9th ed.) Citation

O'Brien, R. J., and N. J. Twombly. A Basic Course in Latin / by R.J. O'Brien and N.J. Twombly. Loyola U.P., 1961.

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