Educational Services Inc. African Education Program. (1965). Secondary C one algebra: The first year of a four year secondary course (Prelim. ed.). ESI.
Chicago-Zitierstil (17. Ausg.)Educational Services Inc. African Education Program. Secondary C One Algebra: The First Year of a Four Year Secondary Course. Prelim. ed. Chicago, IL: ESI, 1965.
MLA-Zitierstil (9. Ausg.)Educational Services Inc. African Education Program. Secondary C One Algebra: The First Year of a Four Year Secondary Course. Prelim. ed. ESI, 1965.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.