Sarbo, Janos J., author
Springer, 2011
Buku Teks
Penguin,, 1972
Buku Teks
Sun Books, 1970
Buku Teks
Council for Research in Values and Philosophy, 2008.
Buku Teks
D. Jungnickel, S.A. Vanstone, editor[s] ; K.T. Arasu [and others]
John Wiley & Sons, 1990
Buku Teks