Bartels, J. (1959). Statistical studies of quasi-periodic variables. Carnegie Institution.
Cita Chicago Style (17a ed.)Bartels, Julius. Statistical Studies of Quasi-periodic Variables. Washington: Carnegie Institution, 1959.
Cita MLA (9a ed.)Bartels, Julius. Statistical Studies of Quasi-periodic Variables. Carnegie Institution, 1959.
Precaución: Estas citas no son 100% exactas.