APA (7th ed.) Citation

(1915). Bibliographic index of American ordovician and silurian fossils. Government print.

Chicago Style (17th ed.) Citation

Bibliographic Index of American Ordovician and Silurian Fossils. Washington: Government print, 1915.

MLA (9th ed.) Citation

Bibliographic Index of American Ordovician and Silurian Fossils. Government print, 1915.

Warning: These citations may not always be 100% accurate.