Cita APA (7a ed.)

Klaus, C. H. (2021). The Ninth Decade: An Octogenarian's Chronicle. University of Iowa Press.

Cita Chicago Style (17a ed.)

Klaus, Carl H. The Ninth Decade: An Octogenarian's Chronicle. Iowa City: University of Iowa Press, 2021.

Cita MLA (8a ed.)

Klaus, Carl H. The Ninth Decade: An Octogenarian's Chronicle. University of Iowa Press, 2021.