Delaney, Patrick N., author
John Wiley & Sons, 1986
Buku Teks
by Luzviminda Casapao [and others]
Barron's Educational Series, 1983
Buku Teks
Thompson, George C., author
Wadsworth, 1965
Buku Teks
Thompson, George C., author
Wassworth, 1969
Buku Teks
Thompson, George C., author
Wadsworth, 1965
Buku Teks