Cita APA (7a 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 Style (17a ed.)
Brookman Stamp Company y Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Cita MLA (9a ed.)
Brookman Stamp Company y Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Precaución: Estas citas no son 100% exactas.