APA aipamena

Roberts, R. M. (1989). Serendipity. John Wiley & Sons.

Chicago Style aipamena

Roberts, Royston M. Serendipity. John Wiley & Sons, 1989.

MLA aipamena

Roberts, Royston M. Serendipity. John Wiley & Sons, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.