Collins, James
The Bruce Publishing Company, 1954
Buku Teks SO
Castell, Alburey
Macmillan, 1959
Buku Teks SO
edited by T.V. Smith and Marjorie Grene
University of Chicago Press, 1957
Buku Teks SO
Scruton, Roger
Pantja SImpati , 1986
Buku Teks SO
edited by Dagobert D. Runes
Littlefield, Adams, 1962
Buku Teks SO