Sanga, O. K. M. (1985). Methods of scientific research. Mzumbe University.
Cita Chicago Style (17a ed.)Sanga, O. K. M. Methods of Scientific Research. Morogoro: Mzumbe University, 1985.
Cita MLA (9a ed.)Sanga, O. K. M. Methods of Scientific Research. Mzumbe University, 1985.
Precaución: Estas citas no son 100% exactas.