Long, David E.
Westview Press, 1985
Buku Teks
Padang Wicaksono, author
2021
UI - Makalah dan Kertas Kerja
Bemis, Samuel Flagg, 1891-1973, author
Holt, Rinehart and Winston, 1965
Buku Teks
Keynoush, Banafsheh, author
Palgrave Macmillan, 2016
Buku Teks
Pratt, Julius W., author
Prentice-Hall, 1965
Buku Teks