APA-viite (7. p.)

LEFFINGWELL, W. H. (1975). Textbook Of Office Management William H. Leffingwell Dan Edwin M. Robinson. McGraw-Hill.

Chicago-viite (17. p.)

LEFFINGWELL, William H. Textbook Of Office Management William H. Leffingwell Dan Edwin M. Robinson. McGraw-Hill, 1975.

MLA-viite (8. p.)

LEFFINGWELL, William H. Textbook Of Office Management William H. Leffingwell Dan Edwin M. Robinson. McGraw-Hill, 1975.