Educational Services Inc. African Education Program. (1966). Secondary four: Geometry (Prelim. ed.). Science Research Associates.
Chicago-referens (17:e uppl.)Educational Services Inc. African Education Program. Secondary Four: Geometry. Prelim. ed. Chicago, IL: Science Research Associates, 1966.
MLA-referens (9:e uppl.)Educational Services Inc. African Education Program. Secondary Four: Geometry. Prelim. ed. Science Research Associates, 1966.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.