Cita APA (7a ed.)

Gillespie, W. M., & Staley, C. A treatise on levelling, topography and higher surveying.

Cita Chicago Style (17a ed.)

Gillespie, William Mitchell, y Cady Staley. A Treatise on Levelling, Topography and Higher Surveying. New York.

Cita MLA (8a ed.)

Gillespie, William Mitchell, y Cady Staley. A Treatise on Levelling, Topography and Higher Surveying.