APA aipamena

D S Halacy. (1968). Century 21: Your life in a year 2001 and beyond. Philadelphia: Macrae Smith.

Chicago Style aipamena

D S Halacy. Century 21: Your Life in a Year 2001 and Beyond. Philadelphia: Macrae Smith, 1968.

MLA aipamena

D S Halacy. Century 21: Your Life in a Year 2001 and Beyond. Philadelphia: Macrae Smith, 1968.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.