APA

Young C. C., Long J. A. & Ritchie A. (1992). Crossopterygian Fishes from the Devonian of Antarctica: Systematics, Relationships and Biogeographic Significance. : .

Chicago

Young Cavin C, Long John A and Ritchie Alexander. 1992. Crossopterygian Fishes from the Devonian of Antarctica: Systematics, Relationships and Biogeographic Significance. : .

Harvard

Young C. C., Long J. A. and Ritchie A. (1992). Crossopterygian Fishes from the Devonian of Antarctica: Systematics, Relationships and Biogeographic Significance. : .

MLA

Young Cavin C, Long John A and Ritchie Alexander. Crossopterygian Fishes from the Devonian of Antarctica: Systematics, Relationships and Biogeographic Significance. : . 1992.