Cita APA (7th ed.)

Unsold, A. (1969). The New Cosmos. Springer-Verlag.

Cita Chicago (17th ed.)

Unsold, Albrecht. The New Cosmos. New York: Springer-Verlag, 1969.

Cita MLA (9th ed.)

Unsold, Albrecht. The New Cosmos. Springer-Verlag, 1969.