Krutch, Joseph Wood, author
Greenwood Press, 1979
Buku Teks
Omrod, Jeanne Ellis, author
Pearson Education, Inc., 2009
Buku Teks
Crandell, Thomas L.
McGraw-Hill, Higher Education, 2009
Buku Teks
Fox, Ira Stuart, author
McGraw-Hill, Higher Education, 2009
Buku Teks
Treshow, Michael, author
McGraw-Hill, 1976
Buku Teks