Cita APA (7a ed.)

Harper, R. (1972). The existential experience. The Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Harper, Ralph. The Existential Experience. Baltimore [etc.]: The Johns Hopkins University Press, 1972.

Cita MLA (9a ed.)

Harper, Ralph. The Existential Experience. The Johns Hopkins University Press, 1972.