Cita APA (7a ed.)

Green, A. K. (1893). Marked "personal". G. P. Putnam's Sons.

Cita Chicago Style (17a ed.)

Green, Anna Katharina. Marked "Personal". New York London: G. P. Putnam's Sons, 1893.

Cita MLA (9a ed.)

Green, Anna Katharina. Marked "Personal". G. P. Putnam's Sons, 1893.