Citazione Stile APA (7a Edizione)

Ward , r. P. . .. (1969). Introduction to electrical engineering (3rd ed.). Prentice Hall.

Citazione stile Chigago Style (17a edizione)

Ward , robert P. Introduction to Electrical Engineering. 3rd ed. New Delhi: Prentice Hall, 1969.

Citatione MLA (9a ed.)

Ward , robert P. Introduction to Electrical Engineering. 3rd ed. Prentice Hall, 1969.