Lindgran, Henry Clay
John Wiley & Sons, 1966
Buku Teks
Powell, Russell A., 1950-, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Powell, Russell A., 1950-, author
Cengage Learning, 2017
Buku Teks
Rachlin, Howard, author
W.W. Norton, 1970
Buku Teks
Kapfer, Mirriam B.
Educational Technology Publication, 1972
Buku Teks