Paz, Mario, author
Erlangga, 1990
Buku Teks
Paz, Mario, author
Erlangga, 1993
Buku Teks
Billings, Marland P., author
Prentice-Hall, 1954
Buku Teks
Harris, Zellig S., author
Chicago Phoenix Books, 1969
Buku Teks
McCormac, Jack C., author
Intenational Textbook, 1966
Buku Teks