Cita APA (7a ed.)

Hecht, F. (1959). IX International Astronautical Congress. Springer Verlag.

Cita Chicago Style (17a ed.)

Hecht, F. IX International Astronautical Congress. Wien: Springer Verlag, 1959.

Cita MLA (9a ed.)

Hecht, F. IX International Astronautical Congress. Springer Verlag, 1959.