Cita APA (7th ed.)

Erwin, E. (1970). The Concept of Meaninglessness. Johns Hopkins Press.

Cita Chicago (17th ed.)

Erwin, Edward. The Concept of Meaninglessness. Baltimore: Johns Hopkins Press, 1970.

Cita MLA (9th ed.)

Erwin, Edward. The Concept of Meaninglessness. Johns Hopkins Press, 1970.