APA Style
Percy, John R.. (2011).
Understanding variable stars .
United Kingdom:
Cambridge University Press.
Chicago Style
Percy, John R..
Understanding variable stars.
United Kingdom:
Cambridge University Press,
2011.
Textbook.
MLA Style
Percy, John R..
Understanding variable stars.
United Kingdom:
Cambridge University Press,
2011.
Textbook.
Turabian Style
Percy, John R..
Understanding variable stars.
United Kingdom:
Cambridge University Press,
2011.
Textbook.