Johnson, Julie K.
Jones and Bartlett Publishers , 2016
Buku Teks
Finucane, Edward W.
CRC/Taylor & Francis, 2006
Buku Teks
McGraw-Hill, 1996
Buku Teks
Ketchum, Paul A.
John Wiley & Sons, 1984
Buku Teks
Bernstein, Lewis
Norwalk Appletton century crofts , 1985
Buku Teks