Cita APA (7a ed.)
Shu, F. H. The physical universe: An introduction to astronomy. University Science Books.
Cita estilo Chicago (17a ed.)
Shu, Frank H. The Physical Universe: An Introduction to Astronomy. Sausalito, EUA: University Science Books.
Cita MLA (9a ed.)
Shu, Frank H. The Physical Universe: An Introduction to Astronomy. University Science Books.
Precaución: Estas citas no son 100% exactas.