Arrowsmith, William. "XI. Foreword". Unmodern Observations (Unzeitgemässe Betrachtungen), New Haven: Yale University Press, 1965, pp. xi-xx. https://doi.org/10.12987/9780300161854-002
Arrowsmith, W. (1965). XI. Foreword. In Unmodern Observations (Unzeitgemässe Betrachtungen) (pp. xi-xx). New Haven: Yale University Press. https://doi.org/10.12987/9780300161854-002
Arrowsmith, W. 1965. XI. Foreword. Unmodern Observations (Unzeitgemässe Betrachtungen). New Haven: Yale University Press, pp. xi-xx. https://doi.org/10.12987/9780300161854-002
Arrowsmith, William. "XI. Foreword" In Unmodern Observations (Unzeitgemässe Betrachtungen), xi-xx. New Haven: Yale University Press, 1965. https://doi.org/10.12987/9780300161854-002
Arrowsmith W. XI. Foreword. In: Unmodern Observations (Unzeitgemässe Betrachtungen). New Haven: Yale University Press; 1965. p.xi-xx. https://doi.org/10.12987/9780300161854-002