MLA

Thomas, Richard Louis. Linn's Who's Who On U.s. Stamps. Sidney, Ohio: Linn's Stamp News, 1991.

APA

Thomas, R. Louis. (1991). Linn's who's who on U.S. stamps. Sidney, Ohio: Linn's Stamp News.

Chicago

Thomas, Richard Louis. Linn's Who's Who On U.S. Stamps. Sidney, Ohio: Linn's Stamp News, 1991.