APA (7th ed.) Citation

Zyznieuski, W., & Zyznieuski, G. (1985). Illinois hiking and backpacking trails. Southern Illinois University Press.

Chicago Style (17th ed.) Citation

Zyznieuski, Walter, and George Zyznieuski. Illinois Hiking and Backpacking Trails. Carbondale: Southern Illinois University Press, 1985.

MLA (9th ed.) Citation

Zyznieuski, Walter, and George Zyznieuski. Illinois Hiking and Backpacking Trails. Southern Illinois University Press, 1985.