Coombs, Philip H., author
Bharata Karya Aksara, 1987
Buku Teks
Deal, Terrence E.
Jossey-Bass, 1999
Buku Teks
Burke, Kay, author
Hawker Brownlow Education, 1999
Buku Teks
Morris, Lynn Lyons, author
Sage, 1985
Buku Teks
Henerson, Marlene E., author
Sage, 1986
Buku Teks