Cita APA (7th ed.)

Carlsen, G. R., & Carlsen, R. C. (1969). Perception: Themes in literature (3rd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Carlsen, G. Robert, i Ruth Christoffer Carlsen. Perception: Themes in Literature. 3rd ed. St. Louis: McGraw-Hill, 1969.

Cita MLA (9th ed.)

Carlsen, G. Robert, i Ruth Christoffer Carlsen. Perception: Themes in Literature. 3rd ed. McGraw-Hill, 1969.