Cita APA (7a ed.)

Langley, S. P. (1902). The Laws of nature. Government Printing Of.

Cita Chicago Style (17a ed.)

Langley, S. P. The Laws of Nature. Washington: Government Printing Of, 1902.

Cita MLA (9a ed.)

Langley, S. P. The Laws of Nature. Government Printing Of, 1902.