Cita APA (7a ed.)

Langley, S. P. (1901). The New spectrum. Government printing office.

Cita Chicago Style (17a ed.)

Langley, S. P. The New Spectrum. Washington: Government printing office, 1901.

Cita MLA (9a ed.)

Langley, S. P. The New Spectrum. Government printing office, 1901.