Gaya APA

Leffingwell, W, H. (1950). textbook of office management / by William H. Leffingwell, Edwin M. Robinson (3rd. ed). : McGraw-Hill Book.

Gaya MLA

Leffingwell, William, H.. "textbook of office management / by William H. Leffingwell, Edwin M. Robinson". 3rd. ed : McGraw-Hill Book, 1950. Referensi.