Astronomer Percival Lowell is best known for his speculations of life on Mars and for influencing the naming of Pluto, chosen in part based on his initials.
Percival Lawrence Lowell. (2013). The Biography Channel website. Retrieved 07:59, May 19, 2013, from http://www.biography.com/people/percival-lowell-9387596.
Percival Lawrence Lowell. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/percival-lowell-9387596 [Accessed 19 May 2013].
"Percival Lawrence Lowell." 2013. The Biography Channel website. May 19 2013, 07:59 http://www.biography.com/people/percival-lowell-9387596.
"Percival Lawrence Lowell," The Biography Channel website, 2013, http://www.biography.com/people/percival-lowell-9387596 [accessed May 19, 2013].
"Percival Lawrence Lowell," The Biography Channel website, http://www.biography.com/people/percival-lowell-9387596 (accessed May 19, 2013).
Percival Lawrence Lowell [Internet]. The Biography Channel website; 2013 [cited 2013 May 19] Available from: http://www.biography.com/people/percival-lowell-9387596.
Percival Lawrence Lowell, http://www.biography.com/people/percival-lowell-9387596 (last visited May 19, 2013).
Percival Lawrence Lowell. The Biography Channel website. 2013. Available at: http://www.biography.com/people/percival-lowell-9387596. Accessed May 19, 2013.