[by] Merrill E. Shanks [and others]
Addison-Wesley, 1965
Buku Teks
Thomas, David A.
Allyn and Bacon, 1991
Buku Teks
california state departement of educatio, 1956
Buku Teks
Rorden, Judith Waring, author
W.B. Saunders Company, 1987
Buku Teks
Beckmann, Sybilla, author
Pearson Addison Wesley, 2008
Buku Teks