Lundy, James L., author
Eurasia Publishing House, 1968
Buku Teks
Bethel, Lawrence L., author
McGraw-Hill Kogakusha, 1971
Buku Teks
Mund, Vernon A.
Appleton-Century-Croft , 1971
Buku Teks
Spriegel, William R. (William Robert), 1893-1972, author
Charles & Tuttle, 1958
Buku Teks
Woodward, Joan, author
Oxford University Press, 1965
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1954
Buku Teks