Welty, James R., author
John Wiley & Sons, 1984
Buku Teks
Edgar, Donald Ernest
Prentice-Hall, 1980
Buku Teks
Roberts, Keith A.
Dorsey Press, 1984
Buku Teks
Vivian, John, author
Pearson and AB, 2007
Buku Teks
Schramm, Wilbur, author
American Hospital Association, 1974
Buku Teks