Baron, M. E. (1973). Number in elementary mathematics: [a course book for teachers and intending teachers in primary and secondary schools] ; Part 1 and 2. Hutchinson Educational.
Chicago-Zitierstil (17. Ausg.)Baron, Margaret E. Number in Elementary Mathematics: [a Course Book for Teachers and Intending Teachers in Primary and Secondary Schools] ; Part 1 and 2. London: Hutchinson Educational, 1973.
MLA-Zitierstil (9. Ausg.)Baron, Margaret E. Number in Elementary Mathematics: [a Course Book for Teachers and Intending Teachers in Primary and Secondary Schools] ; Part 1 and 2. Hutchinson Educational, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.