Cita APA (7a ed.)

Warren, C. N., & Schneider, J. S. (2017). Purple Hummingbird: A Biography of Elizabeth Warder Crozer Campbell. The University of Utah Press.

Cita Chicago Style (17a ed.)

Warren, Claude N., y Joan S. Schneider. Purple Hummingbird: A Biography of Elizabeth Warder Crozer Campbell. Salt Lake City: The University of Utah Press, 2017.

Cita MLA (8a ed.)

Warren, Claude N., y Joan S. Schneider. Purple Hummingbird: A Biography of Elizabeth Warder Crozer Campbell. The University of Utah Press, 2017.