Cita APA (7a ed.)

Wright, G., & Fowler, C. (1986). Investigative design and statistics. Penguin.

Cita Chicago Style (17a ed.)

Wright, George, y Chris Fowler. Investigative Design and Statistics. Harmondsworth: Penguin, 1986.

Cita MLA (9a ed.)

Wright, George, y Chris Fowler. Investigative Design and Statistics. Penguin, 1986.