Hardy, Thomas, 1840-1928
Everyman's Library, 1991
Buku Teks
edited by R.P. Draper
Macmillan, 1986
Buku Teks
Cahyawati
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1991
UI - Skripsi Membership
Thomas, George B.
Pearson - Addison Wesley, 2008
Buku Teks
George Thomas,jr, MauriceD Weir, Joel Hass, Christhopher Heil
Penerbit Erlangga, 2017
Buku Teks