Citazione Stile APA (7a Edizione)

Baird, S. W. (1897). Graded work in arithmetic. Fifth book, numbers from 1 to 20. American Book Co.

Citazione stile Chigago Style (17a edizione)

Baird, S. W. Graded Work in Arithmetic. Fifth Book, Numbers from 1 to 20. Nuew York-Cincinnati- Chicago: American Book Co, 1897.

Citatione MLA (9a ed.)

Baird, S. W. Graded Work in Arithmetic. Fifth Book, Numbers from 1 to 20. American Book Co, 1897.