Cita APA (7a ed.)

Coolidge, S. (1930). What Katy did next. Blackie & Son limited.

Cita Chicago Style (17a ed.)

Coolidge, Susan. What Katy Did Next. London and Glasgow: Blackie & Son limited, 1930.

Cita MLA (9a ed.)

Coolidge, Susan. What Katy Did Next. Blackie & Son limited, 1930.