APA

Percy J. R., Percy J. R., American Association of Variable Star Observers, International Amateur-Professional Photoelectric Photometry (Organization) & Royal Astronomical Society of Canada. (1986). The study of variable stars using small telescopes. Cambridge: Cambridge University Press.

Chicago

Percy John R, Percy John R, American Association of Variable Star Observers, International Amateur-Professional Photoelectric Photometry (Organization) and Royal Astronomical Society of Canada. 1986. The study of variable stars using small telescopes. Cambridge: Cambridge University Press.

Harvard

Percy J. R., Percy J. R., American Association of Variable Star Observers, International Amateur-Professional Photoelectric Photometry (Organization) and Royal Astronomical Society of Canada. (1986). The study of variable stars using small telescopes. Cambridge: Cambridge University Press.

MLA

Percy John R, Percy John R, American Association of Variable Star Observers, International Amateur-Professional Photoelectric Photometry (Organization) and Royal Astronomical Society of Canada. The study of variable stars using small telescopes. Cambridge: Cambridge University Press. 1986.