APA (7th ed.) Citation

Johnson, S., Haslam, G. W., & Dawson, R. (1993). The great central valley: California's heartland. University of California Press.

Chicago Style (17th ed.) Citation

Johnson, Stephen, Gerald W. Haslam, and Robert Dawson. The Great Central Valley: California's Heartland. Berkeley: University of California Press, 1993.

MLA (9th ed.) Citation

Johnson, Stephen, et al. The Great Central Valley: California's Heartland. University of California Press, 1993.