APA aipamena

Hulke J. W. (1891). V. 47; The Quarterly Journal of the Geological Society of London. 1891.

Chicago Style aipamena

Hulke J. W. V. 47; The Quarterly Journal of the Geological Society of London. 1891, 1891.

MLA aipamena

Hulke J. W. V. 47; The Quarterly Journal of the Geological Society of London. 1891, 1891.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.