APA-čujuhus (7. p.)
Brookman Stamp Company & Kaufman, L. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
Chicago-čujuhus (17. p.)
Brookman Stamp Company juo Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
MLA-čujuhus (9. p.)
Brookman Stamp Company juo Lewis Kaufman. Brookman 1994: 60 Years as the Nation's Most Accurate and Respected Guide for Retail Stamp Prices.
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