Grubbs, Robert L
McGraw-Hill Book, 1982
Buku Teks
Strony, Madeline S.
McGraw-Hill , 1962
Buku Teks
Leslie, Louis A.
McGraw-Hill, 1955
Buku Teks
Brazinsky, Gregg
University of North Carolina Press, 2007
Buku Teks
Lamb, Marion M
South-Western Publishing, , 1961
Buku Teks