Cita APA (7th ed.)

Bulthuis. Four Steeples over the City Streets. NYU Press.

Cita Chicago (17th ed.)

Bulthuis. Four Steeples over the City Streets. NYU Press.

Cita MLA (9th ed.)

Bulthuis. Four Steeples over the City Streets. NYU Press.

Atenció: Aquestes cites poden no estar 100% correctes.