National Science Development Board. Scientific Library and Documentation Division. (1977). National union list of serials for science and technology. The Library.
Cita Chicago (17th ed.)National Science Development Board. Scientific Library and Documentation Division. National Union List of Serials for Science and Technology. Taguig, Bicutan: The Library, 1977.
Cita MLA (9th ed.)National Science Development Board. Scientific Library and Documentation Division. National Union List of Serials for Science and Technology. The Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.