Educational Services Inc. African Education Program. (1964). Mathematics secondary two: Rational numbers (Prilim. ed.). ESI.
Chicago-Zitierstil (17. Ausg.)Educational Services Inc. African Education Program. Mathematics Secondary Two: Rational Numbers. Prilim. ed. Watertown, MA: ESI, 1964.
MLA-Zitierstil (9. Ausg.)Educational Services Inc. African Education Program. Mathematics Secondary Two: Rational Numbers. Prilim. ed. ESI, 1964.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.