Egan, Gerard, author
Brooks, 2014
Buku Teks
Egan, Gerard, author
Brooks/Cole, 1986
Buku Teks
Thomas, Edwin J., author
Sage, 1984
Buku Teks
Loughary, John W., author
McGraw-Hill, 1979
Buku Teks
Okun, Barbara F., author
Cengage Learning, 2015
Buku Teks