Ratcliff, Richard U., author
McGraw-Hill, 1949
Buku Teks
Luque, Jaime, author
Springer International Publishing, 2015
eBooks
Barlowe, Raleigh, author
Prentice-Hall, 1961
Buku Teks
Andrews, Richard B., author
The Free Press, 1971
Buku Teks
Ely, Richard T., author
University of Wisconsin Press, 1964
Buku Teks