Citazione Stile APA (7a Edizione)

Allen, C. E. (1969). Machinery's screw thread book (20th ed.). Machinery Publishing.

Citazione stile Chigago Style (17a edizione)

Allen, Clarence Edgar. Machinery's Screw Thread Book. 20th ed. London: Machinery Publishing, 1969.

Citatione MLA (8a ed.)

Allen, Clarence Edgar. Machinery's Screw Thread Book. 20th ed. Machinery Publishing, 1969.