Παραπομπή σε μορφή APA (7η εκδ.)

Del Rosario, J. G. Answering the call to give: When engineering heroes give of their time, talent and treasure.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Del Rosario, Jaime G. Answering the Call to Give: When Engineering Heroes Give of Their Time, Talent and Treasure.

Παραπομπή σε μορφή MLA (9th εκδ.)

Del Rosario, Jaime G. Answering the Call to Give: When Engineering Heroes Give of Their Time, Talent and Treasure.