Hunt, Alfred
N.Y. John Wiley & Sons , 1977
Buku Teks
Stepanek, Joseph E.
The Free Press , 1960
Buku Teks
Durie, Bruce
[publisher not identified], 2001
Buku Teks
Keith, Lyman A.
McGraw-Hill, 1958
Buku Teks
Tonne, Herbert Arthur
McGraw-Hill, 1963
Buku Teks