Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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