Cross, I. Music as an emergent exaptation: Ian Cross. Music, language, and human evolution.(2012).
Citazione stile Chigago Style (17a edizione)Cross, Ian. "Music as an Emergent Exaptation: Ian Cross." Music, Language, and Human Evolution.(2012) .
Citatione MLA (8a ed.)Cross, Ian. "Music as an Emergent Exaptation: Ian Cross." Music, Language, and Human Evolution.(2012), .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.