Cita APA (7th ed.)

Asimov, I. (1974). Tales of the black widowers. A Fawcett Crest Book.

Cita Chicago (17th ed.)

Asimov, Isaac. Tales of the Black Widowers. Connecticut, Estados Unidos: A Fawcett Crest Book, 1974.

Cita MLA (9th ed.)

Asimov, Isaac. Tales of the Black Widowers. A Fawcett Crest Book, 1974.