Graves, Robert, author
Macmillan, 1943
Buku Referensi
Archer, Jerome W., author
McGraw-Hill, 1966
Buku Teks
Archer, Jerome W., author
McGraw-Hill, 1966
Buku Teks
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks
by Francis Bacon [and others]; edited by Burton L. Cooper
Holt. Reinhart and Winston,
Buku Teks