Cita APA (7th ed.)

Beede, J. W., & Kniker, H. T. (1924). Species of the genus Schwagerina and their stratigraphic significance. The University.

Cita Chicago (17th ed.)

Beede, J. W., i Hedwig Thusnelda Kniker. Species of the Genus Schwagerina and Their Stratigraphic Significance. Austin, Tex.: The University, 1924.

Cita MLA (8th ed.)

Beede, J. W., i Hedwig Thusnelda Kniker. Species of the Genus Schwagerina and Their Stratigraphic Significance. The University, 1924.