Cita APA (7a ed.)

Educational Services Inc. African Education Program. (1964). Mathematics secondary two: Rational numbers (Prilim. ed.). ESI.

Cita Chicago Style (17a ed.)

Educational Services Inc. African Education Program. Mathematics Secondary Two: Rational Numbers. Prilim. ed. Watertown, MA: ESI, 1964.

Cita MLA (9a ed.)

Educational Services Inc. African Education Program. Mathematics Secondary Two: Rational Numbers. Prilim. ed. ESI, 1964.