Cita APA (7th ed.)

Wright, K. R., & Valencia Zegarra, A. (2000). Machu Picchu: A civil engineering marvel. ASCE Press. https://doi.org/10.1061/9780784404447

Cita Chicago (17th ed.)

Wright, Kenneth R., i Alfredo Valencia Zegarra. Machu Picchu: A Civil Engineering Marvel. Reston, Virginia: ASCE Press, 2000. https://doi.org/10.1061/9780784404447.

Cita MLA (9th ed.)

Wright, Kenneth R., i Alfredo Valencia Zegarra. Machu Picchu: A Civil Engineering Marvel. ASCE Press, 2000. https://doi.org/10.1061/9780784404447.