Cita APA (7a ed.)

Potgieter, D., & Olen, S. (1993). The View from Above: Map Reading Skills Project.

Cita Chicago Style (17a ed.)

Potgieter, Derek, y Sandra Olen. The View from Above: Map Reading Skills Project. 1993.

Cita MLA (9a ed.)

Potgieter, Derek, y Sandra Olen. The View from Above: Map Reading Skills Project. 1993.