Field, G. Lowell
Cornell University Press, 1967
Buku Teks
Strong, C.F.
Sidgwick & Jackson Limited, 1960
Buku Teks
by Carlton Clymer Rodee ... [et al.]
McGraw-Hill, 1983
Buku Teks
by Carlton Clymer Rodee ... [et al.]
McGraw-Hill Kogakusha, 1976
Buku Teks
Roucek, Joseph S.
Thomas Y. Crowell Company, 1950
Buku Teks