@book{Maderdonner,
  author    = {Maderdonner, Otto},
  title     = {Make Your Way in Business 1A},
  publisher      = {Fachhochschule Technikum Wien},
  subject      = {Business},
  language  = {en}
}
@book{Maderdonner,
  author    = {Maderdonner, Otto},
  title     = {Make Your Way in Business 1B},
  publisher      = {Fachhochschule Technikum Wien},
  subject      = {Business},
  language  = {en}
}