Illinois University. Elementary School Science Project. (1965). Astronomy: Galaxies and the universe. University of Illlinois.
Цитирование в стиле Чикаго (17-е изд.)Illinois University. Elementary School Science Project. Astronomy: Galaxies and the Universe. Urbana: University of Illlinois, 1965.
Цитирование MLA (9-е изд.)Illinois University. Elementary School Science Project. Astronomy: Galaxies and the Universe. University of Illlinois, 1965.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.