Tonga 1 Pa'anga 1980 front.jpg

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İstinadlarRedaktə

ƏdəbiyyatRedaktə

  • Krause, Chester L.; Clifford Mishler (1991). Standard Catalog of World Coins: 1801–1991 (18th ed.). Krause Publications. ISBN 0873411501.
  • Pick, Albert (1994). Standard Catalog of World Paper Money: General Issues. Colin R. Bruce II and Neil Shafer (editors) (7th ed.). Krause Publications. ISBN 0-87341-207-9.