Cita APA

Proctor, M. (1926). The romance of comets. Harper and Brothers Publishers.

Citación estilo Chicago

Proctor, Mary. The Romance of Comets. New York: Harper and Brothers Publishers, 1926.

Cita MLA

Proctor, Mary. The Romance of Comets. Harper and Brothers Publishers, 1926.

Warning: These citations may not always be 100% accurate.