Macmillan Publishing Company, 1987
Buku Referensi
edited by James Swarbrick.
CRC Press, Taylor & Francis Group, 2013
Buku Referensi
edited by Vergilius Ferm
Littlefield, Adam and Co., 1959
Buku Referensi
edited by Vergilius Ferm
Philosophical Library, 1945
Buku Referensi
Thompson Gale, 2005
Buku Teks