APA (7th ed.) Citation

Oliver, C., & Sobel, R. (1969). Our changing world: Man, the world, and the social studies. Laidlaw.

Chicago Style (17th ed.) Citation

Oliver, Carl, and Robert Sobel. Our Changing World: Man, the World, and the Social Studies. River Forest, Ill.: Laidlaw, 1969.

MLA (9th ed.) Citation

Oliver, Carl, and Robert Sobel. Our Changing World: Man, the World, and the Social Studies. Laidlaw, 1969.