APA (7 वां संस्करण) प्रशस्ति पत्र

Cross, I. Music as an emergent exaptation: Ian Cross. Music, language, and human evolution.(2012).

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Cross, Ian. "Music as an Emergent Exaptation: Ian Cross." Music, Language, and Human Evolution.(2012) .

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Cross, Ian. "Music as an Emergent Exaptation: Ian Cross." Music, Language, and Human Evolution.(2012), .