APA (7th ed.) Citation

WKZO (Radio station : Kalamazoo, Mich.), Dunbar, W. F., Edison, E., Hall, W., & Mills, R. Western Michigan at work.

Chicago Style (17th ed.) Citation

WKZO (Radio station : Kalamazoo, Mich.), Willis Frederick Dunbar, E.J Edison, Wesly Hall, and Robert Mills. Western Michigan at Work.

MLA (9th ed.) Citation

WKZO (Radio station : Kalamazoo, Mich.), et al. Western Michigan at Work.