Meiners, Harry F.
John Wiley & Sons, 1969
Buku Teks
Brewer, Richard
Saunders College Publishing, 1982
Buku Referensi
Fischbach, Frances Talaska
J.B. Lippincott, 1992
Buku Teks
Cox, George W.
Wm. C. Brown, 1996
Buku Teks
Smeins, Fred E.
Drive Kendall/Hunt, 1978
Buku Teks