Nichols, Herbert L.
McGraw-Hill , 1976
Buku Referensi
Turner, Joe M.
McGraw-Hill, 2009
Buku Teks
Church, Horace K.
McGraw-Hill, 1981
Buku Referensi
Nichols, Herbert L.
McGraw-Hill, 2010
Buku Teks
Muccigrosso
Krieger publishing company, 2001
Buku Teks