Mehr, Robert I.
Richard D. Irwin, 1983
Buku Teks
by Herbert S. Denenberg ... [et al.]
Prentice-Hall, 1964
Buku Teks
Willett, Allan H.
University of Pennsylvania Press, 1951
Buku Teks
Vaughan, Emmett J.
John Wiley & Sons, 2001
Buku Teks
Hammond, J.D.
Foresman and Company, 1968
Buku Teks