Synge, John L., author
McGraw-Hill, 1959
Buku Teks
Zajac, Alfed
D.C. Heath , 1966
Buku Teks
Perloff, William H., author
John Wiley & Sons, 1976
Buku Teks
Sanford, R.J., author
Pearson Education, Inc., 2003
Buku Teks
Harrison, H.B., 1930-, author
Edward Arnold, 1994
Buku Teks