Métodos y técnicas de investigación. Münch, L. & Ángeles, E. Trillas, México, 2 edition, 1990.
bibtex   
@book{ munch_metodos_1990,
  address = {México},
  edition = {2},
  title = {Métodos y técnicas de investigación},
  isbn = {9682436265 9789682436260},
  language = {Spanish},
  publisher = {Trillas},
  author = {Münch, Lourdes and Ángeles, Ernesto},
  year = {1990}
}
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