Laurence, Margaret
McClelland and Stewart, 1984
Koleksi Publik
Haskew, Laurence D.
Scott and Foresman, 1968
Buku Teks
Hoffmann, Laurence D., author
McGraw-Hill, 1992
Buku Teks
Coupe, Laurence
Routledge , 1997
Buku Teks
Karlins, Marvin, author
Springer, 1970
Buku Teks