APA (7th ed.) Citation

Frankl, P., & O'Gorman, J. F. (1968). Principles of architectural history: The four phases of architectural style, 1420-1900. MIT Press.

Chicago Style (17th ed.) Citation

Frankl, Paul., and James F. O'Gorman. Principles of Architectural History: The Four Phases of Architectural Style, 1420-1900. Cambridge, Mass.: MIT Press, 1968.

MLA (9th ed.) Citation

Frankl, Paul., and James F. O'Gorman. Principles of Architectural History: The Four Phases of Architectural Style, 1420-1900. MIT Press, 1968.

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