Linn's who's who on U.S. stamps
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.