Landing, E., Barnes, C. R., & Stevens, R. K. (1986). Tempo of earliest Ordovician graptolite faunal succession: Conodont-based correlations from the Tremadocian of Quebec. Canadian Journal of Earth Sciences, 23(12), 1928.
Chicago Style (17th ed.) CitationLanding, Ed, Christopher R. Barnes, and Robert K. Stevens. "Tempo of Earliest Ordovician Graptolite Faunal Succession: Conodont-based Correlations from the Tremadocian of Quebec." Canadian Journal of Earth Sciences 23, no. 12 (1986): 1928.
MLA (9th ed.) CitationLanding, Ed, et al. "Tempo of Earliest Ordovician Graptolite Faunal Succession: Conodont-based Correlations from the Tremadocian of Quebec." Canadian Journal of Earth Sciences, vol. 23, no. 12, 1986, p. 1928.
Warning: These citations may not always be 100% accurate.