Cita APA (7a ed.)

Porter, W. S. (1919). Sixes and sevens. Doubleday, Page & Co.

Cita Chicago Style (17a ed.)

Porter, William Sydney. Sixes and Sevens. Garden City, N. Y: Doubleday, Page & Co, 1919.

Cita MLA (9a ed.)

Porter, William Sydney. Sixes and Sevens. Doubleday, Page & Co, 1919.