APA (7th ed.) Citation

Roberts, D. F., Mitchell, R. J., & Jorde, L. B. (1990). Migration and Genetic Structure in Northumberland. Periodicals Archive Online (PAO).

Chicago Style (17th ed.) Citation

Roberts, D. F., R. J. Mitchell, and L. B. Jorde. Migration and Genetic Structure in Northumberland. Baltimore: Periodicals Archive Online (PAO), 1990.

MLA (9th ed.) Citation

Roberts, D. F., et al. Migration and Genetic Structure in Northumberland. Periodicals Archive Online (PAO), 1990.