Cita APA (7a ed.)

Nelson, J. H. The constant-field coil house at the Fredericksburg magnetic observatory. Department of Commerce. Coast and Geodetic Survey.

Cita Chicago Style (17a ed.)

Nelson, J. H. The Constant-field Coil House at the Fredericksburg Magnetic Observatory. Washington: Department of Commerce. Coast and Geodetic Survey.

Cita MLA (9a ed.)

Nelson, J. H. The Constant-field Coil House at the Fredericksburg Magnetic Observatory. Department of Commerce. Coast and Geodetic Survey.