(1) Love(PDF). American Philatelic Society: 1–13. 2011 [2018-01-07]. (原始內容(PDF)存檔於2016-08-03). (2) 8-Cent Special Stamp for Someone Special(PDF). Postal Bulletin (Washington, D.C.: United States Postal Service). 1972-12-21, (20904): 3 [2018-05-12]. (原始內容(PDF)存檔於2018-05-13). (3) Love (1973). Art of the Stamp. SmithsonianNational Postal Museum. [2018-01-18]. (原始內容存檔於2018-01-07). (4) Piazza, Daniel. Love Issue. Arago: People, Postage & The Post (Philately). Washington, D.C.: SmithsonianNational Postal Museum. 2008-08-15 [2018-05-12]. (原始內容存檔於2016-02-03). (5) Baadke, Michael. Special stamps to convey special messages. Linn's Stamp News. Amos Media Company. 1998-11-30 [2018-05-13]. (原始內容存檔於2018-01-18). The first U.S. Love stamp was an 8¢ issue (Scott 1475) that resembled many commemorative stamps from 1973: it was multicolor and about twice the size of the 8¢ Dwight D. Eisenhower definitive stamp (Scott 1394) issued a couple of years before. .... The Postal Service printed 320 million of those Love stamps, about twice the normal print run for a commemorative stamp in those days. .... A publication of the USPS Stamps Division described the issue as "A Special Stamp for Someone Special." (6) 1973 "Love" stamp first day of issue cover. FDCs of Commemorative Stamps ~ 1973. SwapMeetDave. 1973-01-26 [2018-05-13]. (原始內容(photograph)存檔於2018-05-13).