Meagan Ayer, Allen and Greenough’s New Latin Grammar for Schools and Colleges. Carlisle, Pennsylvania: Dickinson College Commentaries, 2014. ISBN: 978-1-947822-04-7. https://dcc.dickinson.edu/grammar/latin/irregular-verbs-vol%C5%8D-n%C5%8Dl%C5%8D-m%C4%81l%C5%8D