Patterson, C.O. Pat, author
Burgess Publishing , 1973
Buku Teks
by Margaret J. Hartman [and others]
Kendall/Hunt, 1976
Buku Teks
Cox, George W., author
Wm. C. Brown, 1996
Buku Teks
Smeins, Fred E., author
Drive Kendall/Hunt, 1978
Buku Teks
Woods, A.E., author
The Avi Publishing, 1977
Buku Teks