APA (7th ed.) Citation

Frebold, H. (1969). Toarcian & bajocian rocks & guide ammonites from southwestern British Columbia.

Chicago Style (17th ed.) Citation

Frebold, Hans. Toarcian & Bajocian Rocks & Guide Ammonites from Southwestern British Columbia. 1969.

MLA (9th ed.) Citation

Frebold, Hans. Toarcian & Bajocian Rocks & Guide Ammonites from Southwestern British Columbia. 1969.

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