APA (7th ed.) Citation

Douglas, S. A., & Johannsen, R. W. (1961). Letters. University of Illinois Press.

Chicago Style (17th ed.) Citation

Douglas, Stephen A., and Robert W. Johannsen. Letters. Urbana: University of Illinois Press, 1961.

MLA (9th ed.) Citation

Douglas, Stephen A., and Robert W. Johannsen. Letters. University of Illinois Press, 1961.

Warning: These citations may not always be 100% accurate.