Kennedy, W., Cobban, W., Elder, W., & Kirkland, J. (1999). Lower Turonian (Upper Cretaceous) Watinoceras devonense Zone ammonite fauna in Colorado, USA.
芝加哥风格引文Kennedy, W., W. Cobban, W. Elder, 与 J. Kirkland. Lower Turonian (Upper Cretaceous) Watinoceras Devonense Zone Ammonite Fauna in Colorado, USA. 1999.
MLA引文Kennedy, W., et al. Lower Turonian (Upper Cretaceous) Watinoceras Devonense Zone Ammonite Fauna in Colorado, USA. 1999.
警告：这些引文格式不一定是100％准确.