Nixon, H.K.
McGraw-Hill, 1931
Buku Teks
Allen, Peter
Pitman, 1998
Buku Teks
Russell, Frederick A.
McGraw-Hill Publishing Company, 1988
Buku Teks
Crissy, W.J.E.
John Wiley & Sons, 1977
Buku Teks
Wingate, John W.
South-Western Publishing, 1959
Buku Teks