APA (7th ed.) Citation

Whittington, H. B., & Campbell, K. S. W. (1967). Silicified Silurian trilobites from Maine. Harvard University.

Chicago Style (17th ed.) Citation

Whittington, H. B., and K. S. W. Campbell. Silicified Silurian Trilobites from Maine. Cambridge: Harvard University, 1967.

MLA (8th ed.) Citation

Whittington, H. B., and K. S. W. Campbell. Silicified Silurian Trilobites from Maine. Harvard University, 1967.

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