Cita APA (7th ed.)
Pope, N., Growald Brooks, N., & Hundertmark, K. Illustrated Guide to the National Postal Museum.
Cita Chicago (17th ed.)
Pope, Nancy, Nancy Growald Brooks, i Kristin Hundertmark. Illustrated Guide to the National Postal Museum.
Cita MLA (9th ed.)
Pope, Nancy, et al. Illustrated Guide to the National Postal Museum.
Atenció: Aquestes cites poden no estar 100% correctes.