Poulton, T. P. (1987). Zonation and correlation of middle Boreal Bathonian to Lower Callovian (Jurassic) ammonites, Salmon Cache Canyon, Porcupine river, northern Yukon.
Chicago-Zitierstil (17. Ausg.)Poulton, Terence P. Zonation and Correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) Ammonites, Salmon Cache Canyon, Porcupine River, Northern Yukon. Ottawa, 1987.
MLA-Zitierstil (9. Ausg.)Poulton, Terence P. Zonation and Correlation of Middle Boreal Bathonian to Lower Callovian (Jurassic) Ammonites, Salmon Cache Canyon, Porcupine River, Northern Yukon. 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.