Padin, C. (2016). Mail Art: A Bridge to Freedom / 2012. The Magazine.
Chicago-Zitierstil (17. Ausg.)Padin, Clemente. "Mail Art: A Bridge to Freedom / 2012." The Magazine 2016.
MLA-Zitierstil (8. Ausg.)Padin, Clemente. "Mail Art: A Bridge to Freedom / 2012." The Magazine, 2016.
警告：這些引文格式不一定是100％准確.