Cita APA (7th ed.)
Perera, K., & Schechter, M. (2013). Topics in critical point theory. Cambridge University Press.
Cita Chicago (17th ed.)
Perera, Kanishka, i Martin Schechter. Topics in Critical Point Theory. Cambridge: Cambridge University Press, 2013.
Cita MLA (9th ed.)
Perera, Kanishka, i Martin Schechter. Topics in Critical Point Theory. Cambridge University Press, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.