Allen, J. W.
A history of political thought in the sixteenth century
Methuen, 1951
 Buku Teks SO
Olmstead, Clifton E.
History of religion in the United State
Prentice-Hall, 1960
 Buku Teks SO
Liliane Mojau
Dari Lapangan Zending Menjadi Gereja Masehi Injili di Halmahera, 1866-1949 = From Missionfield to the Evangelical Christian Church in Halmahera, 1866–1949
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2023
 UI - Tesis Membership
Brinton, Crane, 1898-1968
A history of civilization
Prentice-Hall, 1960
 Buku Teks SO
Ferguson, Wallace K.
A survey of european civilization
Houghton Miffiln, 1942
 Buku Klasik