(Author), C. A. O. (1969). How to make your film show active. International Labour Organization.
Citazione stile Chigago Style (17a edizione)(Author), Charles A. Orr. How to Make Your Film Show Active. International Labour Organization, 1969.
Citatione MLA (9a ed.)(Author), Charles A. Orr. How to Make Your Film Show Active. International Labour Organization, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.