Black, Homer A
Prentice-Hall, 1967
Buku Teks
Josef Thalhamer, editor
[, Springer], 2012
eBooks
Dawkins, Richard, 1941-
Oxford University Press, 1989
Buku Teks
Keller, Evelyn Fox
Harvard University Press, 2000
Buku Teks
Hartman, Philip E.
Prentice Hall of India Private Limited, 1972
Buku Referensi