Educational Services Inc. African Education Program. (1965). Secondary C one algebra: The first year of a four year secondary course (Prelim. ed.). ESI.
Citazione stile Chigago Style (17a edizione)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.
Citatione MLA (9a ed.)Educational Services Inc. African Education Program. Secondary C One Algebra: The First Year of a Four Year Secondary Course. Prelim. ed. ESI, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.