APA (7th ed.) Citation

Holmes, R. B. (1984). The carboniferous amphibian Proterogyrinus scheelei Romer, and the early evolution of tetrapods.

Chicago Style (17th ed.) Citation

Holmes, Robert B. The Carboniferous Amphibian Proterogyrinus Scheelei Romer, and the Early Evolution of Tetrapods. London, 1984.

MLA (9th ed.) Citation

Holmes, Robert B. The Carboniferous Amphibian Proterogyrinus Scheelei Romer, and the Early Evolution of Tetrapods. 1984.

Warning: These citations may not always be 100% accurate.