edited by W.E. Butler
Oceana Publications, 1985
Buku Referensi
Colombus, C. John
Longmans, 1959
Buku Teks
Colombos, C. John, author
Longman, 1959
Buku Teks
Tanaka, Yoshifumi, author
Cambridge University Press, 2012
Buku Teks
Tanaka, Yoshifumi, author
Cambridge University Press, 2015
Buku Teks