Cita APA (7a ed.)
Heinlein, R. A. Assignment in Eternity / The Day After Tomorrow / The Puppet Masters. Signet : New American Library.
Cita estilo Chicago (17a ed.)
Heinlein, Robert A. Assignment in Eternity / The Day After Tomorrow / The Puppet Masters. Nueva York, EUA: Signet : New American Library.
Cita MLA (9a ed.)
Heinlein, Robert A. Assignment in Eternity / The Day After Tomorrow / The Puppet Masters. Signet : New American Library.
Precaución: Estas citas no son 100% exactas.