Παραπομπή σε μορφή APA (7η εκδ.)

Cooper, P. (2009). Beginning Ruby: From Novice to Professional (Second Edition.). Apress : Imprint: Apress.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cooper, Peter. Beginning Ruby: From Novice to Professional. Second Edition. Berkeley, CA: Apress : Imprint: Apress, 2009.

Παραπομπή σε μορφή MLA (8th εκδ.)

Cooper, Peter. Beginning Ruby: From Novice to Professional. Second Edition. Apress : Imprint: Apress, 2009.