APA (7th ed.) Citation

Howells, Y. (1982). Scottish silurian trilobites. Paleontographical Society.

Chicago Style (17th ed.) Citation

Howells, Yvonne. Scottish Silurian Trilobites. London: Paleontographical Society, 1982.

MLA (9th ed.) Citation

Howells, Yvonne. Scottish Silurian Trilobites. Paleontographical Society, 1982.

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