Brier, S., & Matsuura, K. (2010). A Japanese phrase a day practice pad: Learn Japanese, one day at a time! (First edition.). Tuttle Publishing.

Brier, Sam, and Keiko Matsuura. A Japanese Phrase a Day Practice Pad: Learn Japanese, One Day at a Time! First edition. North Clarendon, Vermont ; Japan: Tuttle Publishing, 2010.

Brier, Sam, and Keiko Matsuura. A Japanese Phrase a Day Practice Pad: Learn Japanese, One Day at a Time! First edition. Tuttle Publishing, 2010.