Cita APA (7a ed.)

Percy, J. R. (1986). The study of variable stars using small telescopes. Cambridge University Press.

Cita Chicago Style (17a ed.)

Percy, John R. The Study of Variable Stars Using Small Telescopes. Cambridge: Cambridge University Press, 1986.

Cita MLA (9a ed.)

Percy, John R. The Study of Variable Stars Using Small Telescopes. Cambridge University Press, 1986.