Sienko, Michell J., author
McGraw-Hill, 1974
Buku Teks
Peters, Edward I., author
Saunders College Publishing, 1990
Buku Teks
Chielens, Edward E., author
Gale Research, 1975
Buku Teks
Gordon M. Barrow ... [et.al.]
W.A. Benjamin, 1967
Buku Teks
Campbell, J. A. (James Arthur), author
W.H. Freeman, 1970
Buku Teks