APA (7th ed.) Citation

Sohn, E., Martin, C., & Schulz, B. . [. (2011). Investigating Machu Picchu: An Isabel Soto history adventure. Raintree.

Chicago Style (17th ed.) Citation

Sohn, Emily, Cynthia Martin, and Barbara [] Schulz. Investigating Machu Picchu: An Isabel Soto History Adventure. London: Raintree, 2011.

MLA (9th ed.) Citation

Sohn, Emily, et al. Investigating Machu Picchu: An Isabel Soto History Adventure. Raintree, 2011.