Engelenhoven, Thomas Pieter Gerrit van
Leti: a language of southwest Maluku
KITLV Press, 2004
 Buku Teks
Ashikaga, Ensho
Intermediate Japanese selection from the naganuma readers, book II - IV with Kanji, vocabulary and notes
University of California Press, 1946
 Buku Teks
Ikeda, Tadashi
Classical Japanese grammar, illustrated with texts
Institute of Eastern Culture, 1975
 Buku Teks
Teng, Ssu-Yu
Conversational Chinese with grammatical notes
University of Chicago Press, 1947
 Buku Teks
Linguistic representation of english vocabulary attrition
 Artikel Jurnal