Cita APA (7a ed.)

R.R. Bowker Company. Ulrich's International Peridiocals Directory. vol 1 a - m. R.R. Bower Company.

Cita Chicago Style (17a ed.)

R.R. Bowker Company. Ulrich's International Peridiocals Directory. Vol 1 a - M. Nueva York: R.R. Bower Company.

Cita MLA (9a ed.)

R.R. Bowker Company. Ulrich's International Peridiocals Directory. Vol 1 a - M. R.R. Bower Company.