Educational Services Inc. African Education Program. (1964). Mathematics secondary two: Geometry (Prelim. ed.). ESI.
Chicago Style (17. basım) AtıfEducational Services Inc. African Education Program. Mathematics Secondary Two: Geometry. Prelim. ed. Watertown, MA: ESI, 1964.
MLA (9th ed.) AtıfEducational Services Inc. African Education Program. Mathematics Secondary Two: Geometry. Prelim. ed. ESI, 1964.
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