Paulus, author
W.B. Saunders , 1978
Buku Teks
Passer, Michael W., author
McGraw-Hill, 2009
Buku Teks
Kalish, Richard A., author
Wadsworth, 1966
Buku Teks
Johnson, Ronald C. (Ronald Charles), author
John Wiley & Sons, 1969
Buku Teks
Passer, Michael W., author
McGraw-Hill, 2007
Buku Teks