Midgley, Mary, author
Routledge, 2006
Buku Teks
edited and with an introd. by Arnold B. Arons [and] Alfred M. Bork
Prentice-Hall, 1964
Buku Teks
Ladyman, James, author
Routledge, 2002
Buku Teks
Bowker-Saur, 2018
Majalah, Jurnal, Buletin
Peason, Karl
Meridian Books , 1957
Buku Teks