Impact Books, 1993
Buku Referensi
Mihanovich, Clement S., author
Bruce Publishing Company, 1957
Buku Referensi
Fouloy, Christian D. De., author
Martinus Nijhoff Publishers, 1994
Buku Referensi
Abrams, M. H. (Meyer Howard), 1912-, author
Harcourt Brace Jovanovich College Publishers, 1971
Buku Teks
Thompson, Elizabeth H., author
American Library Association, 1943
Buku Teks