Cita APA

Pickering, J. S., & Pickering, J. S. (1960). 1001 questions answered about astronomy. New York, New York: Dodd, Mead.

Citación estilo Chicago

Pickering, James Sayre, y James Sayre Pickering. 1001 Questions Answered About Astronomy. New York, New York: Dodd, Mead, 1960.

Cita MLA

Pickering, James Sayre, y James Sayre Pickering. 1001 Questions Answered About Astronomy. New York, New York: Dodd, Mead, 1960.