एपीए उद्धरण

Pérgolis, J. C., & Rodríguez Ibarra, C. I. (2013). The spirit of time in cities and their books. Universidad Católica de Colombia.

शिकागो स्टाइल उद्धरण

Pérgolis, Juan Carlos, और Clara Inés Rodríguez Ibarra. The Spirit of Time in Cities and Their Books. Universidad Católica de Colombia, 2013.

एमएलए उद्धरण

Pérgolis, Juan Carlos, और Clara Inés Rodríguez Ibarra. The Spirit of Time in Cities and Their Books. Universidad Católica de Colombia, 2013.