Woolfolk, Anita E.
Allyn and Bacon , 1995
Buku Teks
Hoy, Anita Woolfolk, 1947-
Allyn and Bacon, 2004
Buku Teks
Gage, N.L.
Houghton Miffiln, 1988
Buku Teks SO
De Cecco, John P.
Prentice-Hall, 1974
Buku Teks
edited by Kathleen M. Cauley and Gina M. Pannozzo
McGraw-Hill, 2013
Buku Teks