Vaccari, O., & Vaccari, E. E. j. a. (1963). Complete course of Japanese coversation grammar: A new practical method of learning the Japanese language ([18th ed.] entirely reset and greatly enlarged.). Vaccari's language Institute.

Vaccari, Oreste, and Enko Elisa joint auth Vaccari. Complete Course of Japanese Coversation Grammar: A New Practical Method of Learning the Japanese Language. [18th ed.] entirely reset and greatly enlarged. Tokyo: Vaccari's language Institute, 1963.

Vaccari, Oreste, and Enko Elisa joint auth Vaccari. Complete Course of Japanese Coversation Grammar: A New Practical Method of Learning the Japanese Language. [18th ed.] entirely reset and greatly enlarged. Vaccari's language Institute, 1963.