Educational Services Inc. African Education Program. (1963). Mathematics secondary one: Introduction to algebra and to the language of geometry (Prelim. ed.). ESI.
Цитирование в стиле Чикаго (17-е изд.)Educational Services Inc. African Education Program. Mathematics Secondary One: Introduction to Algebra and to the Language of Geometry. Prelim. ed. Watertown, MA: ESI, 1963.
Цитирование MLA (9-е изд.)Educational Services Inc. African Education Program. Mathematics Secondary One: Introduction to Algebra and to the Language of Geometry. Prelim. ed. ESI, 1963.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.