APA aipamena

Hackman, B. W. (1979). Chance, coincidence, serendipity.

Chicago Style aipamena

Hackman, B W. Chance, Coincidence, Serendipity. 1979.

MLA aipamena

Hackman, B W. Chance, Coincidence, Serendipity. 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.