APA (7th ed.) Citation

Lenz, A. C. (1982). Llandoverian Graptolites of the Northern Canadian Cordillera: Petalograptus, Cephalograptus, Rhaphidograptus, Dimorphograptus, Retiolitidae, and Monograptidae. Royal Ontario Museum.

Chicago Style (17th ed.) Citation

Lenz, Alfred C. Llandoverian Graptolites of the Northern Canadian Cordillera: Petalograptus, Cephalograptus, Rhaphidograptus, Dimorphograptus, Retiolitidae, and Monograptidae. Toronto: Royal Ontario Museum, 1982.

MLA (9th ed.) Citation

Lenz, Alfred C. Llandoverian Graptolites of the Northern Canadian Cordillera: Petalograptus, Cephalograptus, Rhaphidograptus, Dimorphograptus, Retiolitidae, and Monograptidae. Royal Ontario Museum, 1982.