Schroeder, Richard G.
John Wiley & Sons, 1978
Buku Teks
Kastantin, Joseph T.
Quorum Books, 1988
Buku Teks
Leonard, William G.
McGraw-Hill, 1960
Buku Teks
Murphy, Mary E.
Richard D. Irwin, 1966
Buku Teks
Pahler, Arnold J.
Harcourt Brace Jovanovich, 1985
Buku Teks