Hulke J. W. (1891). V. 47; The Quarterly Journal of the Geological Society of London. 1891.
Chicago Style aipamenaHulke J. W. V. 47; The Quarterly Journal of the Geological Society of London. 1891, 1891.
MLA aipamenaHulke J. W. V. 47; The Quarterly Journal of the Geological Society of London. 1891, 1891.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.