Russkaya grammatika v anekdotach (trenazher dlya nachinayushhich): shutki i anekdoty, dialogi i monologi, zadachi i zagadki, voprosy i viktoriny. — Levina G.M., Vasil′eva T.V. — 1997 — ISBN 978-5-86547-506-4 (e-book) | Exlibrus