by Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1956
Buku Teks
by Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1962
Buku Teks
Mund, Vernon A., author
Appleton-Century-Crofts, 1971
Buku Teks
Bethel, Lawrence L., author
McGraw-Hill Kogakusha, 1971
Buku Teks
White, Kendall C., author
Alexander Hamilton Institute, 1962
Buku Teks