Cita APA

Jeffrey, H. (1961). The earth today: A collection of papers dedicated to sir Harold Jeffrey. Royal Astronomical Society.

Citación estilo Chicago

Jeffrey, Harold. The Earth Today: A Collection of Papers Dedicated to Sir Harold Jeffrey. London: Royal Astronomical Society, 1961.

Cita MLA

Jeffrey, Harold. The Earth Today: A Collection of Papers Dedicated to Sir Harold Jeffrey. London: Royal Astronomical Society, 1961.