Shulman, Lawrence, author
Brooks/Cole Cengage Learning, 2012
Buku Teks
O`Hara, Agi, author
Oxford University Press, 2014
Buku Teks
Lewis, Harold, author
Lois and Samuel Silberman Fund, 1982
Buku Teks
Cournoyer, Barry R., author
Brooks/Cole Cengage Learning, 2011
Buku Teks
Konopka, Gisela, author
Prentice-Hall, 1963
Buku Teks