Baird, S. W. (1900). Graded work in arithmetic. Fifth book, numbers from 1 to 20. American Book Co.
Chicago-Zitierstil (17. Ausg.)Baird, S. W. Graded Work in Arithmetic. Fifth Book, Numbers from 1 to 20. Nuew York-Cincinnati- Chicago: American Book Co, 1900.
MLA-Zitierstil (9. Ausg.)Baird, S. W. Graded Work in Arithmetic. Fifth Book, Numbers from 1 to 20. American Book Co, 1900.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.