Andrews, Donald H., author
Wiley Eastern, 1965
Buku Teks
Wood, Jesse H., author
Evenston Harper, 1963
Buku Teks
Sorum, C. H., author
Prentice-Hall, 1955
Buku Teks
by J.H. Wood ... [and others]
Evenston Harper, 1963
Buku Teks
Gilrearth, Esmarch S., author
McGraw-Hill, 1958
Buku Teks