Japanese grammar/ Hideichi Ono

Japanese as it is spoeken : a beginners grammar / by Joseph W. Ballantine

Mahir berbahasa Jepang dalam sepekan = Japanese in a week

Pictorial Chinese-Japanese characters: a new and fascinating method to learn ideography/ Enko Elisa Vaccari

Complete course of Japanese conversation grammar a new and practical method of learning the Japanese Language / Oreste Vaccari, Enko Elisa Vaccari