Thompson, Steven K.
John Wiley & Sons, 2012
Buku Teks
Vanasse, Robert W.
McGraw-Hill, 1976
Buku Teks
Ohara, John B.
N,Y. Holt , 1964
Buku Teks
Cochran, William G.
John Wiley , 1963
Buku Teks
Scheaffer, Richard L.
Brooks/Cole Cengage Learning, 2012
Buku Teks