Swisher, Carl Brent, author
Houghton Miffiln, 1943
Buku Teks
Langdon, Robert M., author
Littlefield Adams, 1961
Buku Teks
Williams, Robin M., author
Alfred A. Knopf, 1961
Buku Teks
Bone, Hugh A., author
McGraw-Hill, 1965
Buku Teks
East, Sara Toll, author
H.W. Wilson, 1963
Buku Teks