APA način citiranja (7. izdanje)

Firkins, O. W., & Firkins, I. T. E. (1934). Memoirs and letters of Oscar W. Firkins. University of Minnesota Press.

Čikaški stil citiranja (17. izdanje)

Firkins, Oscar W., i Ina Ten Eyck Firkins. Memoirs and Letters of Oscar W. Firkins. Minneapolis: University of Minnesota Press, 1934.

MLA način citiranja (8. izdanje)

Firkins, Oscar W., i Ina Ten Eyck Firkins. Memoirs and Letters of Oscar W. Firkins. University of Minnesota Press, 1934.