Alexander, Robert M., 1972-, author
Thomson/Wadsworth, 2006
Buku Teks
by Ruth Cunningham ...[et al.]
Teacher College. Columbia University, 1952
Buku Teks
Rothenberg, Lawrence S., author
Cambridge University Press, 1992
Buku Teks
edited by Suzanne McMahon; Miriam Palm; Pam Dunn
The Haworth Press, Inc., 1991
Buku Teks
Shaw, Marvin E., author
New York, 1981
Buku Teks