APA (7th ed.) Citation

Smith, T. R., & Slater, J. (2009). Architecture Classic and Early Christian. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, T. Roger, and John Slater. Architecture Classic and Early Christian. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Smith, T. Roger, and John Slater. Architecture Classic and Early Christian. Project Gutenberg, 2009.

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