Issel, L. Michele
Jones & Bartlett Learning, 2014
Buku Teks
Issel, L. Michele
Jones and Barlett Publ., 2004
Buku Teks
by W. R. Ferguson
Applied Science Publisher, 1973
Buku Teks
Leedy, Paul D.
Pearson Education, 2005
Buku Teks
Gershon J. Shugar ... [and others]
Glencoe Press, 1977
Buku Teks