Alger, Horatio
Horaito Alger Association of Distinguished America, 1994
Buku Teks
Magenis, Alice
American Book Company, 1959
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1973
UI - Skripsi (Membership)
Russell, Conrad
Oxford University Press, 1971
Buku Teks
Blyth, Conrad Alexander
Allen & Unwin, 1966
Buku Teks