APA-referens (7:e uppl.)

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.