De Vries, Mary Ann, author
[Publisher not identified], 1978
Buku Teks
De Vries, Mary Ann, author
Prentice-Hall, 1995
Buku Referensi
Mager, N. H., author
Prentice-Hall, 1975
Buku Referensi
Bay Books, 1986
Buku Referensi
editor, Rom Harre, Roger Lamb
Blackwell Reference, 1983
Buku Referensi