Cita APA (7a ed.)

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.