Beck, Raymond W., author
Burgess, 1977, 1977
Buku Teks
Kugler, Otto E.
Burges Publishing, 1968
Buku Teks
Kimball, John W., author
Erlangga, 1991
Buku Teks
Weisz, Paul B., author
McGraw-Hill, 1963
Buku Teks
Johnson, Willis H., author
Holt, Rinehart and Winston, 1961
Buku Teks