Lenk, John D.
Reston , 1978
Buku Referensi
Springer New York, 2019
eBooks
Buchsbaum, Walter H.
Prentice-Hall, 1987
Buku Referensi
editor, Roger L. Brockenbrough, Frederick S. Maerritt
McGraw-Hill, 1994
Buku Referensi
Roberts, John
Spon Press, 2001
Buku Referensi