Stratmann, Francus Henry
Middle-English dictionary containing words used by English writen from the twelfth to the fifteenth century A New edition, re-arranged, revised, and englarged by
London Oxford University Press 1958
 Buku Referensi
Funk and Wagnalls new pratical standard dictionary of the English language editor
New York Funk and Wagnalls Company 1955
 Buku Referensi
Funk and Wagnalls standard dictionary of the English language International Edition
New York Funk and Wagnalls 1958
 Buku Referensi
Cowan, H.K.J (Hendrik Karel Jan)
Grammar of the Sentani language. With specimen texts and vocabulary / H. K. J. Cowan
Martinus Nijhoff, , 1965 [1966]
 Buku Teks
Cowan, H.K.J (Hendrik Karel Jan)
Grammar of the Sentani language ; with specimen texts and vocabulary
Martinus Nijhoff, 1965
 Buku Teks