Educational Services Inc. African Education Program. (1966). Secondary C. three: Geometry (Prelim. ed.). Science Research Associates.
Citazione stile Chigago Style (17a edizione)Educational Services Inc. African Education Program. Secondary C. Three: Geometry. Prelim. ed. Chicago, IL: Science Research Associates, 1966.
Citatione MLA (9a ed.)Educational Services Inc. African Education Program. Secondary C. Three: Geometry. Prelim. ed. Science Research Associates, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.