Lamb, Marion M
South-Western Publishing, , 1961
Buku Teks
Grubbs, Robert L
McGraw-Hill Book, 1982
Buku Teks
Strony, Madeline S.
McGraw-Hill , 1962
Buku Teks
Renshaw, Wallace W.
Gregg Publishing Company , 1937
Buku Teks
Pradya Paramita, 1994
Buku Teks