Cita APA (7a ed.)

Scientific American. (1977). Cosmology +1. W. H. Freeman and comp.

Cita Chicago Style (17a ed.)

Scientific American. Cosmology +1. San Francisco: W. H. Freeman and comp, 1977.

Cita MLA (9a ed.)

Scientific American. Cosmology +1. W. H. Freeman and comp, 1977.