APA (7th ed.) Citation

Illinois. University. Elementary School Science Project. (1965). Astronomy: Gravitation (4th ed.). University of Illinois.

Chicago Style (17th ed.) Citation

Illinois. University. Elementary School Science Project. Astronomy: Gravitation. 4th ed. Urbana: University of Illinois, 1965.

MLA (9th ed.) Citation

Illinois. University. Elementary School Science Project. Astronomy: Gravitation. 4th ed. University of Illinois, 1965.

Warning: These citations may not always be 100% accurate.