London : William Clowes and Sons Ltd
Majalah, Jurnal, Buletin
Hastie, Reid
New York McGraw-Hill Book [T.th.]
Buku Teks
Schodek, Daniel L.
Prentice-Hall, 1980
Buku Teks
Schodek, Daniel L.
Prentice-Hall, 1998
Buku Teks
Schodek, Daniel L.
Prentice-Hall, 1998
Buku Teks