Cita APA (7th ed.)

Leivtt, I. M. 1., & Cole, D. M. (1963). Exploring the secrets of space; astronautics for the layman. Prentice-Hall.

Cita Chicago (17th ed.)

Leivtt, Israel Monroe 1908, i Dandridge M. Cole. Exploring the Secrets of Space; Astronautics for the Layman. Englewood Cliffs, N. J: Prentice-Hall, 1963.

Cita MLA (9th ed.)

Leivtt, Israel Monroe 1908, i Dandridge M. Cole. Exploring the Secrets of Space; Astronautics for the Layman. Prentice-Hall, 1963.