Yotsuba&! Vol 2. (Yotsubato) (in Japanese)
チーズスイートホーム(1) (モーニングKCDX (1943))
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Yotsuba&!, Vol. 1
Yotsuba&! Vol. 3 (Yotsubato!) (in Japanese)
Japanese the Manga Way: An Illustrated Guide to Grammar and Structure
よつばと! 4 (電撃コミックス)
GENKI I: An Integrated Course in Elementary Japanese
Genki: An Integrated Course in Elementary Japanese Workbook I [Second Edition] (Japanese Edition)