Lens, Sidney
Thomas Y Corwell , 1969
Buku Teks
by Thomas L. Hartshorne ... [and others]
Longman, 2003
Buku Teks
Binder, Frederick M., author
D.C. Heath, 1988
Buku Teks
George Braziller, 1963
Buku Teks
Cochran, Thomas C., author
Macmillan, 1947
Buku Teks