Citazione Stile APA (7a Edizione)

Leffingwell, W. (1975). Text book of office management (3rd.). McGraw Hill.

Citazione stile Chigago Style (17a edizione)

Leffingwell, W. Text Book of Office Management. 3rd. New Delhi: McGraw Hill, 1975.

Citatione MLA (9a ed.)

Leffingwell, W. Text Book of Office Management. 3rd. McGraw Hill, 1975.