Changes in methods of working with people in groups 1890-1950 /
by Ray Leon Richardson.

APA Citation

Richardson, R. Leon. (1950). Changes in methods of working with people in groups 1890-1950. .

MLA Citation

Richardson, Ray Leon. Changes In Methods of Working With People In Groups 1890-1950. , 1950.

Warning: These citations may not always be complete (especially for serials).