Kitap
Name: Lazare, Jules
Printery: Ginn and Company
Published: Boston
Date:
Name: Lebauer, Susan R.
Printery: Pergamon Press
Published: Oxford
Date: 1983
Name: Lee, Motoko Y. /
Abd-Ella, mokhtar and Burks, Linda A.
Published: Washington
Date: 1981
Name: Lerner, Laurence D.
Printery: Oxford Unversity Press
Published: London
Date: 1956