Não informado. (1928). Journal of Education for Business. Heldref Publications.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of Education for Business. Washington: Heldref Publications, 1928.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of Education for Business. Heldref Publications, 1928.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.