APA (7th ed.) Citation

Porter, P. W., & Sheppard, E. S. (1998). A world of difference: Society, nature, development. Guilford Press.

Chicago Style (17th ed.) Citation

Porter, Philip Wayland, and Eric S. Sheppard. A World of Difference: Society, Nature, Development. New York: Guilford Press, 1998.

MLA (9th ed.) Citation

Porter, Philip Wayland, and Eric S. Sheppard. A World of Difference: Society, Nature, Development. Guilford Press, 1998.