by Daniel S. Cheever ... [et al.]
Addison-Wesley, 1986
Buku Teks
by Peter Coburn ... [et al.]
Addison-Wesley, 1985
Buku Teks
National Education Association of the United States and the American Association of School Administrators, 1958
Buku Teks
Jorgensen, Carolyn, author
Brandy, 1990
Buku Teks
Bell, William D., author
McGraw-Hill, 1957
Buku Teks