Maddux, Robert B.
Erlangga, 2001
Buku Teks
Burger, Chester
Macmillan, 1964
Buku Teks
Cantor, Nathaniel
Harper & Brothers, 1958
Buku Teks SO
Cantor, Nathaniel
Harper & Brothers, 1958
Buku Teks SO
Stryker, Perrin
Harper & Row, [date of publication not identified]
Buku Teks SO