McNulty, James E.
University of Pennsylvania Press, 1964
Buku Teks
Allen, Louis A.
McGraw-Hill Kogakusha, 1958
Buku Teks
Brech, E.F.L.
Longmans, Green & Co. , 1957
Buku Teks
Brech, E.F.L.
Longman , 1970
Buku Teks
Church, Jeffrey
McGraw-Hill, 2000
Buku Teks