edited by Raymond E. Wolfinger
Prentice-Hall, 1966
Buku Teks
Grande, Sandy, 1964-, author
Rowman and Littlefield, 2015
Buku Teks
Cummings, Milton C.
Harcourt Brace Jovanovich, 1981
Buku Teks
Cummings, Milton C.
Harcourt Brace Jovanovich, 1977
Buku Teks
Friedrich, Carl Joachim
McGraw-Hill, 1963
Buku Teks