Roberts, R. M. (1989). Serendipity: Accidental discoveries in science. New York: John Wiley & Sons, Inc.
Trích dẫn kiểu ChicagoRoberts, Royston M. Serendipity: Accidental Discoveries in Science. New York: John Wiley & Sons, Inc, 1989.
ציטוט MLARoberts, Royston M. Serendipity: Accidental Discoveries in Science. New York: John Wiley & Sons, Inc, 1989.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.