Cita APA (7th ed.)
Brookman Stamp Company & Kaufman, L. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Cita Chicago (17th ed.)
Brookman Stamp Company i Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Cita MLA (9th ed.)
Brookman Stamp Company i Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Atenció: Aquestes cites poden no estar 100% correctes.