APA-referens (7:e uppl.)

Hudders, E. R. (1916). Indexing and filing: A manual of standard practice ((3d printing).). The Ronald press company.

Chicago-referens (17:e uppl.)

Hudders, Eugene Russell. Indexing and Filing: A Manual of Standard Practice. (3d printing). New York: The Ronald press company, 1916.

MLA-referens (8:e uppl.)

Hudders, Eugene Russell. Indexing and Filing: A Manual of Standard Practice. (3d printing). The Ronald press company, 1916.